- merge ioquake3 updates
- support "servercfg" directory for server-side configuration
- fix potential error due to zero length bot or arena files
- add "fs_download_mode" cvar, replacing "fs_saveto_dlfolder" and "fs_restrict_dlfolder"
- minor tweaks and improvements
The auxiliary sourcedir feature has been removed, since the same functionality is generally available through the servercfg system.