Source engine games:
* mapcycle and motd files now reside in the cfg folder by default, or in the root as a fallback.
* Default mapcycle and motd files are now shipped as cfg/xxx_default.txt, and will be used if the filename convar is at the default value and no custom file is found in the cfg folder or the root.
* mapcycle file can contain blank lines and //-style comments
* mapcycle file loaded from the custom folder.
* Greatly reduced memory usage on the client and server
* Added some hardcoded rules to the “end” of sv_pure rule list.
* Fixed some filesystem calls not properly obeying pure server rules.
* Fixed model bounds and simple materials consistency checking rules. (Fixed Counter-Strike server spew.)