* Add more [Crule](https://www.unrealircd.org/docs/Crule) functions:
* `is_tls()` returns true if the client is using SSL/TLS
* `in_security_group('known-users')` returns true if the user is in the
specified [security group](https://www.unrealircd.org/docs/Security-group_block).
* `match_mask('*@*.example.org')` or `match_mask('*.example.org')`
returns true if client matches mask.
* `match_ip('192.168.*')` or with CIDR like `match_ip('192.168.0.0/16')`
returns true if IP address of client matches.
Reported by BlackBishop.
This rename free_config_defines() to init_config_defines and calls it from
config_read_start() so caller doesn't have to think about it.
And this is easily mistaken with "REHASH -global" which rehashes all
the IRC servers on the network.
In fact, who knows some year(s) from now we may map "REHASH -all"
to "REHASH -global", but... not yet...
* When booting for the first time (without any cached files) the IRCd
downloads GeoIP.dat. If that fails, e.g. due to lack of internet connectivity,
we now show a warning and continue booting instead of it being a hard error.
Note that we already dealt with this properly after the file has been cached
(so after first download), see "What if your web server is down" in
[Remote includes](https://www.unrealircd.org/docs/Remote_includes#What_if_your_web_server_is_down).
And update release notes:
* Add more [Crule](https://www.unrealircd.org/docs/Crule) functions:
* `is_away()` returns true if the client is currently away
* `has_user_mode('x')` returns true if all the user modes are set on the
client.
* `has_channel_mode('x')` can be used for spamfilters with a destination
channel, such as messages: it returns true if all specified channel modes
are set on the channel.
This fixes a bug where if you run ./Config with 'auto' file descriptors,
and then have an unusually low 'ulimit -n' of like 150, you would end up
with a negative amount of file descriptors available for use.
This fix moves it from compile-time setting of reserved fd's to runtime
setting.
All this is wrong, by the way, but that is for another major overhaul,
at least this bug is fixed now :D
https://github.com/unrealircd/unrealircd/pull/265 by Valware
"This is an IRCv3 extension which lets clients opt-out of receiving /names on join.
This is useful for bots on large channels who do not need to know who is in the channel.
Specification: https://ircv3.net/specs/extensions/no-implicit-names"
+ module rename from 'no-implicit-names-cap' to 'no-implicit-names'
(simply because no other modules has that -cap suffix)
+ update to Makefile.windows
* The [Central Spamfilter](https://www.unrealircd.org/docs/Central_Spamfilter),
which provides spamfilter { } blocks that are centrally managed, is
now fetched from a different URL if you have an Central API key set.
This way, we can later provide spamfilter { } blocks that build on
central blocklist scoring functionality, and also don't have to reveal
the central spamfilter blocks to 100% of the world.
Bram Matthys