Log Message:
Update to 2.2.6.

Changes:
- fix Inferno intermission screen crash
- fix lockup for other netgame clients when one client quits
- fix memory leak in netgame server
- fix SDL_LockScreen crashes on Win32
- fix fuzz drawing for hi-res
- network games should survive temporary loss of connection
- fix dehacked NOSECTOR/NOBLOCKMAP effects
- fix player spawn sound