Log Message:
Upgrade to 2.2.4 (latest stable version).

This closes PR pkg/23346 by Soren Jacobsen.

Changes since 2.2.3:

* Fixed sky-over-sky HOM.
* Add sound compatibility option.
* Improve sound volume accuracy.
* Shared texture palette isn't the default anymore (glboom).
* Better invulnerabilty rendering for non paletted OpenGL.
* Network game server can now read config files to set game options.
* Fix latency problems in LAN games.
* Small compilation fixed for OpenGL on some unix platforms.
* Fix for dehacked files which change frames.
* Fixed name clash when compiling for some unix platforms.
* Flag counted items with different colour on the IDDT automap.
* Fixed extra shot sound when chaingun runs out of ammo.
* Fix some telefragging related desyncs.
* Fixed offsets for flipped sprites.
* Hopefully fix problems with network games on big-endian platforms.