- added compatibility setting for stuff in Cheogsh2 MAP04's megasphere cage which is positioned too low.
- externalized "New save game" line for save screen.
- fixed: R_DeinitPlanes did not free all visplanes because it called R_ClearPlanes with 'fullclear' set to false.
- removed some redundancy from R_ClearPlanes.
- fixed: userinfo_t needs a destructor to delete its CVARs when it is destroyed.
- fixed another leak with userinfos: Since they are no longer POD they may not be memset to 0 in the player_t constructor.