- user.c, m_server.c: remove IsDead() tests in register_local_user() and server_estab() that are no longer
  needed. ages ago, the sendto_* functions used to call exit_client() (via dead_link())

- Change accept/callerid related code to no longer re-use the 'struct split_nuh_item' and have
  its own 'struct AcceptItem' instead. Minor other cleanups to callerid related functions.

- Final removal of backwards compatibility code for ircd-hybrid 8.2.22 and below. Also,
  minimum supported version of Anope is now 2.0.8.

- m_pass.c: if a client sends multiple PASS messages, only accept the password sent in the first one

- Revert echo-message changes for now

- m_cap.c:m_cap(): remove test on cmd->proc

- Rudimentary `cap-notify` support

- Removed Connection::cap_client; renamed Connection::cap_active to Connection::cap

- m_invite.c: cleanup kludgy type-casting

- Add FLAGS_CAP302 to client flags for clients that support the CAP 302 extension

- m_monitor.c: remove copyright that no longer applies

- Stylistical changes

- Replace WATCH with IRCv3.2 MONITOR

- m_invite.c:ms_invite(): timestamped INVITE messages are mandatory now

- m_stats.c:parse_stats_args(): eliminate accessing 'parc'

- m_svstag.c: eliminate accessing 'parc'

- m_server.c: whitespace changes

- m_message.c:handle_special(): remove pointless strchr(nick, '%') test. Support for host names has been removed years ago.

- For consistency, the `general::network_desc` configuration directive has been renamed to `general::network_description`

- m_nick.c:uid_from_server(): replace 'if' with 'else if'

- m_server.c: minor documentation cleanups

- m_svsmode.c: cleanups; remove possibility to modify hosts/accountnames as these are now handled by SVSHOST and SVSACCOUNT, respectively

- User mode 'u' and 'b' have been removed
- Spam/flooding notices that previously have been sent to user mode 'b' now go to user mode 'f'

- Add SVSACCOUNT command handler

- m_stats.c:stats_ports(): mark listeners with deferred accept() with 'D' in "STATS P"

- m_who.c:who_matches(): add support for CIDR notation

- m_kick.c:m_kick(): simplify half-op testing logic on 'member_source'

- Cleanup ip address matching routine in various places

- Added 'client' option to listener::flags

- Rename some occurrences of 'client_p' to 'client'

- m_kline.c:kline_handle(): add missing IsClient() test to prevent the non-wildcard rejection NOTICE from being sent to servers

- m_svshost.c: don't pass SVSHOST to other servers in case the host name is invalid

- m_svsnick.c: always send the 5 arg SVSNICK to other servers

- m_knock.c: reject request with ERR_CANNOTKNOCK if MODE_NOKNOCK is set

- channel_mode.c:channel_modes(): minor optimization to save potentially redundant member_find_link() calls

- Rename channel_member_names() to channel_send_namereply()

- m_close.c: replace DLINK_FOREACH_SAFE with a simple while()

- Rename find_channel_link() to member_find_link()

- m_sjoin.c: fixed ages old bug where server name hiding would not work for bmask removal; incorporate server name hiding cleanups from m_join.c

- m_join.c:remove_a_mode(): minor logic fix to previous commit

- m_join.c: minor cleanups to server name hiding;  remove pointless remove_our_modes() wrapper

- Fixed remaining style issues

- m_mode.c: style correction

- m_whois.c:whois_person(): fixed archaic bug where, when sending a RPL_WHOISCHANNELS reply to a remote client, it could be truncated on the remote side in case the server/client IDs are longer than the actual names

- Add METADATA command handler for later use

- Rename Client::certfp to Client::tls_certfp

- m_set.c:quote_spamnum(): use proper conversion specifier for GlobalSetOptions.spam_num

- m_links.c: minor cleanups to parameter handling

- m_module.c:mo_module(): remove sanity test on parv[1] that's now no longer needed

- Refactor Message flags

- m_topic.c:ms_topic(): remove redundant test on 'parc'

- Each type of command handler now has its own min/max argument count pair;  remove remaining argument checks from all modules

- Move setting of client->servptr to more appropriate places

- Change m_userhost() and m_ison() so sendto_one_numeric() can be used

- m_accept.c:list_accepts(): replace sprintf with snprintf

- Fixed style inconsistencies in various places

- Masking of k- and i-lines to regular users has been removed. Just with other stats, reporting to regular users can now only be enabled or disabled.
- Free memory pointed to by client->connection->password in register_local_user()

- m_stats.c:report_auth(): swap tests

- m_nick.c: change all check_clean_* functions to bool type

- Extban $n of type 'acting' has been implemented. This extban prevents matching users from changing their
  nick while in the channel. Users with voice or above are not affected.
- Channel mode +N has been changed so channel members with +v can change nick names, too

- m_join.c:ms_join(): fixed ages old bug where in the channel it would appear as if the client removed the modes/topic instead of the server

- Reduce size of some user mode relevant buffers from IRCD_BUFSIZE (512) to UMODE_MAX_STR (56)

- Move channel invitation related functions to channel_invite.c

- m_who.c:who_matches(): match() against x->realhost, too

- Stylistic changes

- The --enable-openssl, --enable-gnutls switches, and their disabling counterparts --disable-openssl and --disable-gnutls, have been replaced with
  the --with-tls switch which takes one of the following options: 'openssl', 'wolfssl', 'gnutls', and 'none'.
  If nothing has been specified, configure tries to autodetect in the following order openssl/libressl -> gnutls -> wolfssl.

- Minimum supported GnuTLS version is 3.6.5 now

- m_names.c:m_names(): remove extraneous test on 'parc'

- Various stylistic changes

- Command handlers are now of type void again

- Renamed 'creationtime' Channel structure member to 'creation_time'

- m_stats.c:stats_tab[]: use designated initializers

- m_server.c:mr_server(): drop the connection in case the other side attempts to introduce a server name we don't expect.

- m_server.c:server_estab(): clean up stupid logic where we perform an extra test on client_p->connection->confs to
  see whether the connect{} block record really got attached

- m_stats.c:show_ports(): style correction

- m_stats.c:stats_servlinks(): use IEC prefixes

- m_unkline.c: merge kline_remove_and_notify() into kline_remove();  add a notice when attempting to remove a conf based k-line instead of telling the user that the k-line doesn't exist. m_undline.c: likewise

- m_svsmode.c: use 'true' instead of plain 1 as second argument to sendto_common_channels_local()

- Stylistic changes

- m_away.c: killed ms_away(), a pure duplicate of m_away()

- Move oper_privs_as_string() from conf.c to m_stats.c

- Removed general::tkline_expire_notices configuration directive and added user mode +X (sees *LINE expiration notices) instead

- Killed CurrentTime

- m_server.c:server_estab(): for consistency, set client_p->connection->created_real here as well, even if we don't need it for servers

- Use monotonic clock for client->connection->first_received_message_time and channel->first_received_message_time

- Make more timers use monotonic time

- auth.c: remove auth_timeout_queries() and related code. Just let the dns and identd timeouts finish the request
- Removed IDENTTIMEOUT from '/set' options. We now no longer allow users to change this on runtime. identd timeout is 5 seconds now

- Cleanup server connecting related code even further
- Make comm_connect_tcp() take less arguments and remove unused dns resolving functionality

- m_info.c: stylistic changes

- Tidy up some enums;  misc style corrections

- m_set.c:quote_autoconnall(): prevent 'status' from being OOB read in case the type of GlobalSetOptions.autoconn ever changes again

- No longer enforce a lower limit of MAXCLIENTS_MIN on GlobalSetOptions.maxclients and ConfigServerInfo.default_max_clients

- m_sjoin.c: use bool

- autoreconf

- Fixed issue with remote RESV introduced in -r8670

- m_dline.c:dline_check(): deduplicate

- Get rid of version.c

- modules: replace MODULE_FLAG_CORE and MODULE_FLAG_NOUNLOAD with dedicated variables;  fixed the ircd from crashing in case reloading a module fails

- Rewrites to have parse_handle_command() end the flood grace period.  MODE and TIME no longer ends the grace period.

- Boolify

- m_cap.c: change most functions to void type

- m_resv.c:ms_resv(): add missing newline

- m_oper.c:oper_up(): in preparation for further configuration subsystem rewrites, don't retrieve the conf pointer through x->connection->confs.head->data. Pass it as separate pointer to oper_up() instead.

- More parse_aline() tweaks

- Further parse_aline() cleanups; get rid of find_user_host()
- /KLINE and /DLINE now no longer supports nick names

- Stylistic changes

- m_topic.c:ms_topic(): fixed server name hiding issue

- m_join.c: remove unused header include

- Make use of the bool data type in some more places

- Use bool data type in struct Whowas

- m_sjoin.c:remove_ban_list(): minor cleanups

- m_nick.c: stylistic changes

- m_nick.c: fix compile error

- m_server.c: merge 'Simplyify server_check logic, do not use magic constants everywhere' (Adam)

- Rename Channel:locmembers to Channel::members_local

- Sprinkle some assert(); cleanup existing ones

- Killed Connection::aftype. Use Client::ip.ss.ss_family instead.

- m_unresv.c: stylistic changes

- m_knock.c: avoid indexing parv[] multiple times

- m_whois.c:whois_person(): services clients are now tagged with 'is a Network Service' in "WHOIS"

- m_svskill.c: cleanup ms_svskill(). args_min is 3 now. A TS argument is now always required, but it can be 0

- m_stats.c:stats_tab[]: who would have thought that R comes right after Q

- m_die(), m_restart(): don't give any hints about how to use this command if missing the server name parameter. Just send ERR_NEEDMOREPARAMS.

- Add channel_get_list() to channel.c which should be used when accessing channel_list outside of channel.c

- Allow a matching function to be passed to conf_service.c:service_find()

- Rename some functions to comply with naming convention

- m_server.c:ms_sid(): use source_p->from instead of client_p

- m_stats.c:stats_tstats(): fixed 'unknown closes' statistic; minor cleanup

- m_userhost.c:m_userhost(): changed size of 'response' buffer to something more sane

- Clean up some awful CONF_SERVER handling in serv_connect()

- Move fd_dump() to m_stats.c; rename it to stats_fdlist()

- autoreconf

- autoreconf

- Restore fd_table. No longer allocate fde_t items from within any other structures like the AuthRequest, or Connection structure
- struct AuthRequest once again is no longer allocated from within the Connection structure

- autoreconf

- Remove experimental libgeoip support

- m_help.c:do_help(): silence some valgrind warning

- m_trace.c:do_trace(): 'tab' should be const here

- m_trace.c:do_trace(): restore H6 behavior where the RPL_TRACECLASS list would be sent only on a full TRACE list

- m_etrace.c:do_etrace(): cleanups

- m_encap.c: documenting

- Store real host information in Client.realhost and extend the UID message to send the actual host.
  This allows operators to see the real host of a client in /whois and /whowas.

- Move all CAPAB related code to server_capab.c, and server_capab.h

- Cleanup channel mode table handling

- m_trace.c: reformatting

- m_etrace.c:do_etrace(): cleanup function arguments

- m_module.c:module_reload(): use EXIT_FAILURE for exit()

- m_trace.c: kill ms_trace() not really needed

- m_trace.c: documentation

- Fixed style inconsistencies in various places

- Implemented channel mode 'L'. Channels with that mode set can make use of an extended ban list size
  specified with the new 'channel::max_bans_large' configuraton option. This mode can be set only by
  irc-operators or servers.

- Implement channel mode 'u' which hides bmasks (+b/+e/+I) to non-chanops everywhere

- m_xline.c: fixed style inconsistencies

- m_trace.c: use me.name for RPL_TRACEEND

- Fixed old bug where lusers/stats u would report an invalid max local connection count in RPL_STATSCONN

- Rename get_client_name() to client_get_name()

- m_whowas.c:do_whowas(): rename variable

- m_stats.c:stats_memory(): add some server stats

- m_trace.c:do_actual_trace(): replace hash_find_client() with find_person() so remote requests with UIDs are processed properly

- Cleanup some bad mess in mo_trace(). This also fixes some bug where we would get RPL_TRACELINK replies with
  "ac2ptr_is_NULL!!" from remote servers including SIDs or UIDs.

- Get rid of Count.myserver

- No longer put servers on the 'global_client_list'. This was just bad.

- Rename hunt_server() to server_hunt()

- Update copyright years

- m_kill.c: removed target's SID from the kill notice

- Style corrections

- m_etrace.c:do_etrace(): swap test

- m_invite.c:m_invite(): adjust "/invite" to work with the new Invite structure

- m_oper.c: move oper-up logging to oper_up()

- m_pong.c: cleanup ms_pong()

- m_connect.c: update comments

- m_eob.c: remove server_eob() backwards compatibility code

- Make hash.c:free_list_task() use dlinkDelete() instead of dlinkFindDelete()

- Import FLOODTIME changes from p4

- m_svsnick.c: add source ts support

- Implement INVITE expirations

- Get rid of clear_ban_cache_channel() and clear_ban_cache_client(). Use clear_ban_cache_list() instead.

- m_whois.c:whois_person(): re-add /whois notice. Goes to user mode +y

- Remove excessive const keyword on dlink_node pointers

- m_svsmode.c: revert -r7666

- m_dline.c, m_xline.c: whitespace changes

- m_svsmode.c: use const

- m_nick.c:perform_nick_change_collides(): whitespace change

- m_stats.c:stats_L_list(): remove extraneous test on ConfigServerHide.hide_server_ips since get_client_name() already deals with that

- m_svinfo.c:ms_svinfo(): whitespace change

- m_who.c:m_who(): swap tests

- m_who.c: merged big mask matching conditional statement found in who_global() and who_common_channel() into a separate function.
  As a side effect this fixes a possible server name leak in who_global() with server hiding enabled

- m_stats.c:stats_memory(): use the %zu conversion specifier

- m_stats.c:stats_memory(): fix /invite memory stats

- m_stats.c:stats_memory(): remove away/topic info as these have a fixed size now

- Merge send_capabilities() and show_capabilities() into get_capabilities()

- autoreconf

- channel.c, m_message.c: stylistic changes

- m_sjoin.c: we're only doing UIDs

- Removed KILLLEN; use REASONLEN instead

- m_stats.c: style corrections; use const keyword where appropriate

- m_stats.c:stats_memory(): remove TOTAL info which is completely off anyway

- m_stats.c: renamings

- m_stats.c:stats_memory(): remove extraneous whowas_count_memory() call

- Change whowas system to use a linked list instead of othe this monolithic WHOWAS table
- Size of the whowas nick name history length is now configurable

- m_stats.c:stats_memory(): variable renamings; remove unused code

- m_stats.c: remove unused header includes

- m_dline.c, m_kline.c: expiry time for *LINES set by remote clients is no longer capped at MAX_TDKLINE_TIME

- m_dline.c: deduplicate

- m_xline.c: deduplicate

- m_kline.c:ms_kline(): allow services to override valid_wild_card()

- m_set.c:quote_autoconn(): use conf->name when reporting the server name

- Remove useless parameters from operator_find()

- m_stats.c: merge some of the recently introduced conf-report functions

- m_svskill.c: remove unused header include

- m_resv.c, m_xline.c: replaced atoi() with strtoumax()

- m_message.c:build_target_list(): stylistic changes

- Show some stats about allocated listeners in /stats z

- m_eob.c:ms_eob(): use proper conversion specifier

- m_stats.c:report_gecos(): whitespace change

- m_info.c: OUTPUT_STRING for libgeoip_ipv4_database_file and libgeoip_ipv6_database_file

- Further fixes to resv rewrite

- Improve libGeoIP support

- Move resv.* to conf_resv.*

- Clustering has been broken in -r7159. Rewrote most of the shared/cluster implementation to be less obscure.
  This introduces a little bit of code duplication, but increases readability, is less error prone, and
  reduces memory consumption a bit.

- m_rehash.c:mo_rehash(): fixed match() test

- Incorporate gnutls support by Adam & Attila

- m_webirc.c: constification;  avoid multiple array indices;  stylistic changes;  improve server notices

- Improve documentation

- m_tburst.c: mention that parv[5] can be an empty string

- m_topic.c:ms_topic(): fixed parameter validation

- watch.h, watch.c, m_watch.c: rename some variables for consistency

- m_resv.c, m_unresv.c: 'standardize' RESV/UNRESV notices/logging to look similar to KLINE/DLINE/XLINE messages

- m_squit.c: improve SQUIT logging; make logging look similar to CONNECT for consistency

- m_connect.c: improve CONNECT logging

- Operators can now REHASH on remote servers; requested by astrutt
- REHASH now requires at least one parameter which currently might be one of CONF, MOTD, or DNS

- m_connect.c:ms_connect(): parv[3] is not allowed to be NULL, so clean up weird logic checking EmptyString(parv[2])

- m_userhost.c: replaced a MyClient() test with just MyConnect()

- Renamed MyCalloc to xcalloc

- m_help.c:do_help(): document the +1 on 'path'

- Remove trailing whitespaces

- m_mode.c, m_tmode.c: optimization; now no longer lookup remote clients for channelmembership as we grant remote clients full chanop status anyway

- USERHOST_REPLYLEN I never liked. Gone.

- m_message.c: minor cleanups

- Add CMEMBER_STATUS_FLAGS / CMEMBER_STATUS_FLAGS_LEN and make use of it in some places (replaces some magic values sprinkled in the code)

- m_server.c: rename set_server_gecos() to server_set_gecos()

- m_server.c: add some documentation for server_set_flags()

- m_server.c: add 'flag' and 'sid' argument to SERVER command; add 'flag' argument to SID command.
- m_pass.c: mention that parv[3] and parv[4] will be deprecated in some future release

- m_svinfo.c: whitespace changes

- m_svinfo.c: do some logging when dropping a link due to incompatible TS version

- Added channel mode +T which forbids NOTICEs to be sent to a channel

- m_stats.c: made the idle time look nicer in STATS v|p by using a formatted time string

- CAPAB_SVS is now mandatory

- Removed client->account backwards compatibility hacks for 8.1

- m_svinfo.c: style corrections

- Use the %ju conversion specifier for time_t and get rid of these non-portable (unsigned long) casts; replace some uint64_t with uintmax_t

- m_invite.c: fix arguments to sendto_channel_local()

- Merge sendto_channel_local_butone() functionality into sendto_channel_local() and get rid of sendto_channel_local_butone()

- m_nick.c: clean up/clarify some tests in check_clean_nick, ms_nick

- m_nick.c:change_remote_nick(): use const

- m_nick.c: use me.id a sender prefix when sending KILL in check_clean_nick, check_clean_user, check_clean_host; sprinkle some asserts

- Rename 'xconf_item' list to 'gecos_items'

- m_who.c: use const keyword where appropriate

- set_user_mode(), oper_up(): minor logic fixes

- m_whowas.c: rename variable

- Use client->name when updating the fd's associated name record with fd_note()

- m_userhost.c: minor documentation update

- Renamed serverhide::links_delay configuration directive to serverhide::flatten_links_delay

- Add dissect_time() from HOPM and make use of it in some places

- Clean up stats handling a bit and made lookups constant time

- m_message.c: swap keywords on 'ntargets'; minor style corrections

- Fixed inconsistent style in several places

- m_info.c:send_birthdate_online_time(): use date() instead of myctime()

- Added 'close' to irc-operator flags

- m_locops.c:ms_locops(): avoid multiple array indices; improve readability

- m_svskill.c: use CONF_NOREASON as default reason just like in m_kill.c

- Added 'resv' and 'unresv' operator flags

- m_who.c:do_who(): use const keyword where appropriate

- m_server.c:ms_sid(): should be using get_client_name() in these two places

- m_server.c:server_estab(): use get_client_name() when reporting errors

- Fixed some server related get_client_name() calls where HIDE_IP is used instead of SHOW_IP. get_client_name()
  already deals with hide_server_ips and falls back to HIDE_IP if IP hiding is enabled.

- m_svsmode.c:ms_svsmode(): move the 'ts = atol()' assignment right after the find_person()

- m_invite.c: p4 style broadcast of INVITE to all servers on the network

- m_server.c:server_estab(): removed comment that's outdated for 24 years now

- m_kick.c: doxygen

- Rename several functions in channel.c to comply with naming convention

- Remove unused header includes

- Make server_die() use enum; minor cleanups here and there

- Rename server capabilities flags from CAP_* to CAPAB_*

- Make use of enum in more places

- m_resv.c:parse_resv(): remove local/remote info to be consistent with the other *LINE notices. The sender's server is shown in the notice anyway.

- m_resv.c:parse_resv(): swap tests on 'name' to make more sense

- m_resv.c:parse_resv(): check for wildcards in channel resvs, too

- Make use of the *Flag() macros in some more places

- Set keyword and eol-style properties

- m_nick.c:ms_uid(): removed redundant parc < 10 test

- Moved all ISUPPORT related code to isupport.c; renamed several functions to meet our coding convention

- Move all SID/UID related code to id.c

- Various documentation updates provided by Jackal

- Added 'xline_exempt' to auth{} block flags

- Removed useless header includes

- m_resv.c: use m_unregistered() for the UNREGISTERED_HANDLER

- m_who.c:m_who(): use explicit NULL when calling who_global() for /who with no params

- Use C99-style initializers in all struct Message items
- Removed MFLG_SLOW
- Removed DUMMY_HANDLER

- m_xline.c: fixed invalid command sytnax when broadcasting XLINEs to other servers. First argument can't be a digit.

- m_xline.c: don't allow legit-looking fake exit reasons like "Ping timeout: 240 seconds"; constification

- Renamed clear_invites() to clear_invites_channel()
- Added separate clear_invites_client()

- m_undline.c: use LOG_TYPE_DLINE

- m_dline.c, m_kline: renamed functions

- m_kline.c: deduplication

- Get rid of valid_comment()

- m_dline.c:mo_dline(): get rid of some stupid parse_netmask() call

- m_kline.c:already_placed_kline(): removed 'warn' parameter we don't need

- m_dline.c: allow d-lines to be added even if an exempt {} exists

- Removed glines
- Added kline_min_cidr, kline_min_cidr6, dline_min_cidr and
  dline_min_cidr6 configuration options

- Reject remote k-line requests that don't have enough non-wildcard characters

- m_nick.c:uid_from_server(): default to '*' for clients that don't have an accountname assigned

- Removed TS_DOESTS, DoesTS, and related code

- Changed some members of the Ban structure to use fixed-size arrays

- Mostly whitespace changes

- Constifications

- WHOWAS now shows IP addresses to irc operators
- Changed RPL_WHOISACTUALLY numeric string. In the future it will also show the
  *real* hostname once we distinguish between spoofs/vhosts and real hosts

- m_message.c: style corrections

- m_nick.c: minor fixes to update fd info accordingly if unregistered clients
  change just the case of their nick. Patch provided by Adam.

- m_kick.c:ms_kick(): replaced IsServer() test with IsClient()

- Don't make use of CAP_TS6 as we no longer need it, but still send it to other servers via CAPAB for backward compatibility

- Cleanups to the svstag implementation

- m_whois.c:whois_person(): don't leak RPL_WHOISOPERATOR if target is +H

- Finish basic SVSTAG implementatio

- m_mode.c, m_svsmode.c, m_svsnick.c: const correctness

- m_stats.c: minor cleanups to comments; removed invalid ones

- m_topic.c:ms_topic(): if we ever have servers changing topics via TOPIC,
  make sure we don't leak hidden server names

- Added basic SVSTAG implementation for later use

- m_whois.c: operators may now see certificate fingerprints, user modes and hidden channels as well.
  This used to be admin only.

- m_map.c:dump_map(): removed 'static' keyword from buf

- Fixed bug where "/rehash" would always reset the "MAX", "JFLOODTIME", and "JFLOODCOUNT" values that
  have been changed from within IRC via the "/set" command
- Renamed the following ircd.conf configuration directives to be more descriptive:

  max_clients -> default_max_clients
  join_flood_count -> default_join_flood_count
  join_flood_time -> default_join_flood_time

- Updated related ircd.conf documentation accordingly

- Added channel mode +C which prevents users from sending CTCPS to a channel