* Updated to ZDoom 4185:
- Use a TArray for backing up cvars overwritten by a demo.
- Added C_GetMassCVarString(), which C_WriteCVars() is now a wrapper around.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@1540 b0f79afe-0144-0410-b225-9a4edf0717df