test
first pass on automatically recording server-side demos.

setting sv_autoDemo 1 will enable.  you must explicitly set sv_autoDemoBots
1 to save bot demos automatically.  auto-demoing will interfere with manual
demoing, so don't mix the two.

the demos are grouped into a single folder per map + time map started.
optionally, set sv_autoDemoMaxMaps to automatically delete demos from more than N maps ago.

Conflicts:
	codemp/qcommon/q_shared.h
	codemp/server/server.h
	codemp/server/sv_bot.cpp
	codemp/server/sv_ccmds.cpp
	codemp/server/sv_main.cpp