Added UDP fallback from HTTP downloads and support for Q2Pro-style HTTP URLs.
Now allows downloading non-numerical pak files via flagging certain paks as protected.
Misc filesystem changes.
Fixed crash in Fog_Off() when called from ShutdownGame(), typically when trying to load an incompatible savegame from a different (or different version) game DLL.
Added filesytem function exports to game DLL from development branch to support game DLLs compiled for that version.