[MP] Update a few cvars more correctly in UI module.
[MP] Remove Q_EXPORT_C that was doing nothing now.
[SP] Cvar update fixes in cg_draw.cpp.
[SP] Remove cgi_EndGame.  Replaced with local function and call to disconnect cmd.
[SP] Show player in entitylist cmd.
[SP] Shutdown the filesystem on a quit.
[SP] Filesystem stuff from MP and cleanup.
[SP] Bring Q_strstrip and Q_strchrs over from MP.