unrealircd: Update to 5.0.2

Upgrade notes (seem like there are very few breaking changes):

     https://www.unrealircd.org/docs/Upgrading_from_4.x

What's new in UnrealIRCd 5:

     * Channel history. You can now see the last couple of lines that have
       been said on channels when you JOIN. For this you need to set channel
       mode +H, eg: eg: /MODE #chan +H 15:1440

     * More IRCv3 features. Additional details are communicated to clients
       which may help with displaying information. Implemented specs are:
       account-tag, message-ids, time, echo-message, labeled-response and
       BATCH.

     * Ban exceptions (/ELINE). You can now exempt users dynamically on IRC
       from *LINES, spamfilter, throttling, blacklist checking, connection
       floods, bypassing antirandom, etc. Just type /ELINE on IRC to see
       details.

     * *LINES and Spamfilters are remembered: All of these are saved to a
       file every few minutes and saved across reboots. This uses the new
       tkldb module (loaded by default). No need for services for that
       anymore.

     * Persistent channels are remembered: For channels which have mode +P
       set we now save all channel settings across reboots (topic, regular
       modes and +beI lists). This via the channeldb module (loaded by
       default).

     * Anti connect-flood measures. In the last few 4.2.x versions we
       introduced Connthrottle and reputation. In 5.x these modules are now
       loaded by default for increased security.

     * Easily restrict commands to fight drones. You can now disable any
       command or impose restrictions, such as: command can only be executed
       after being connected for XX seconds, or if you are identified to
       services, etc. See the example for how to restrict LIST, INVITE and
       messaging.

     * Module manager for managing 3rd party modules easily. Install and
       update modules with a single command.

     * Condition configuration. You can have condition configuration where
       you e.g. @define $IP "203.0.113.1" and can use $IP everywhere in the
       configuration file. Similarly, support for @if-blocks. This is
       especially useful for advanced users who like to use the same
       configuration file on multiple machines, usually with the help of
       remote includes.

     * Improved Channel Mode +L now kicks in for any rejected join, so not
       just for +l but also for +b, +i, +O, +z, +R and +k. If, for example,
       the channel is +L #insecure and also +z then, when an insecure user
       ties to join they will be redirected to #insecure.

     * Ban forwards. New extended ban ~f to forward users to the specified
       channel if the ban matches. Example: MODE #chan +b
       ~f:#badisp:*!*@*.isp.org

     * Improved WebSocket support. We already supported websockets, but now
       we support websocket type 'text', which is compatible with web IRC
       clients such as Kiwi IRC.

     * Code cleanups. The biggest effort of all went into cleaning up old
       code and making the code much more readable. This also means that
       UnrealIRCd 5 will not be able to link with really older servers or
       services, like UnrealIRCd 3.2.x.

     * Windows version is 64-bits. This should allow for increased address
       space and security. This also means UnrealIRCd 5 will not run on
       32-bits Windows (should be rare nowadays, anyway)


(nia)

$NetBSD: patch-include_h.h,v 1.1 2020/01/28 13:03:36 nia Exp $

Do not declare own errno.

--- include/h.h.orig	2020-01-22 06:30:42.000000000 +0000
+++ include/h.h
@@ -209,7 +209,7 @@ extern int dgets(int, char *, int);
 #ifdef _WIN32
 extern MODVAR int debuglevel;
 #else
-extern int debuglevel, errno, h_errno;
+extern int debuglevel, h_errno;
 #endif
 extern MODVAR int OpenFiles;  /* number of files currently open */
 extern MODVAR int debuglevel, portnum, debugtty, maxusersperchannel;