Changes:
* Added support for the IRCv3 Labeled Response specification.
* Added support for help topics to the helpop module.
* Added support for pagination to the index output of the HELPOP
command.
* Added support for passing module names to --{disable,enable} using
their short names (e.g. --enable-extras ssl_gnutls).
* Added support for passing space-delimited module names to
--{disable,enable}-extras (e.g. --enable-extras "ssl_gnutls
ssl_mbedtls").
* Added support for the X-Real-IP and X-Forwarded-For headers to the
websocket module.
* Added the codepage module — a better solution for custom 8-bit
character set support than the incredibly broken and undocumented
nationalchars module.
* Changed the default for <waitpong:sendsnotice> to no.
* Changed the user count in LUSERS so that it no longer includes
services pseudoclients.
* Developer: add Channel::WriteRemoteNotice which sends a notice to
remote users as well as local users.
* Developer: add a status char option to Channel::WriteNotice for
sending status messages.
* Developer: add the ClientProtocol::MessageTagEvent class to allow
handling message tags easier.
* Developer: added MessageTarget::GetName to allow easily getting the
name of a message target.
* Developer: added a status char option to the TagMessage constructor
for sending status messages.
* Developer: added an "oper only" parameter to
Simple{Channel,User}ModeHandler.
* Developer: added empty string checks to the
Numerics::NoSuch{Channel,Nick} constructors.
* Developer: added several variadic overloads of the
IRCv3::Replies::Reply::Send method.
* Developer: added the OnCommandBlocked event for when the execution of
a command is blocked.
* Developer: added the UserManager::ULineCount method for counting
pseudoclients on ulined servers.
* Developer: added the inspircd.org/poison capability which rejects any
attempt to request it to avoid clients requesting all available
capabilities rather than the ones they support.
* Developer: added the stdalgo:delete_zero method for deleting and
zeroing a pointer.
* Developer: deprecated the ProtocolInterface::Send{Channel,User}Notice
methods in favour of SendMessage.
* Developer: disabled CULLLIST log messages unless the server has been
built in debug mode.
* Developer: switched from Travis CI to GitHub Actions.
* Developer: the FailedPort type now contains the config tag that the
listener was created from.
* Fix connections to ports which have an invalid I/O hook configured not
being rejected.
* Fix various Perl tools not looking in the right directory for the
make::* modules.
* Fixed a bug in helpop.conf.example where the SWHOIS key was not using
the correct value name.
* Fixed allowing TAGMSG messages to be sent without any tags attached.
* Fixed boolean configuration options not being matched in a case
insensitive way.
* Fixed not using case insensitive comparisons for the DCCALLOW
subcommands.
* Fixed not using case insensitive matching when checking if a SSL
rehash has been requested.
* Fixed not using the ERR_INVALIDMODEPARAM numeric when not enough
parameters are given to the snomask mode.
* Fixed not using the RPL_REHASHING numeric for remote rehashes.
* Fixed parsing CTCPs in the dccallow module.
* Fixed prioritisation of custom events provided by modules.
* Fixed spamming the log with DNS cache clearing notices when nothing
was actually cleared.
* Fixed status messages not working with the TAGMSG command.
* Fixed the chanhistory module not storing message tags.
* Fixed the chanhistory module not storing notices.
* Fixed the chanhistory module storing CTCPs.
* Fixed the legacy PROTOCTL NAMESX command not using case insensitive
matching.
* Fixed the legacy PROTOCTL UHNAMES command not using case insensitive
matching.
* Fixed the nationalchars module allowing nicknames which begin with a
number.
* Fixed the nationalchars module not rebuilding the 005 numerics on
unload.
* Fixed the nationalchars module not restoring the previous casemapping
name on unload.
* Fixed the systemd unit file starting InspIRCd before the network is
online.
* Fixed unnecessarily making N*2-1 too many copies of the command
arguments when processing a command with multiple targets.
* Improve the warning process when starting InspIRCd as root.
* Improved the ban message shown to users if they are banned by an
extban.
* Improved the output when a port can not be bound.
* Removed the preceding - from the MOTD, server operator MOTD, and any
custom MOTDs added with the showfile module.
* Renamed <chanhistory:notice> to <chanhistory:prefixmsg> so the
behaviour is less ambiguous.
* Replace the Windows getopt_long shim with the ya_getopt library.
* Updated the example MOTD and server operator MOTD to be a bit prettier
and show off some of the escape codes.
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