games/nehquake: unbreak, undeprecate, and assume maintainership
Define LICENSE (GPLv2 or later), add missing USE_XORG components,
do not allow ``make build'' to succeed when compilation actually
fails, bump MAX_PRINTMSG value to accommodate long GL extensions
string returned by modern video cards, amend post-install advice.
Tested on: 13-STABLE/i386 + ATI Radeon HD 4350 (RV710)
This Nehahra engine is basically a bug-fixed version of the released 2.54
source. It has also most of the fixes/features of the Enhanced GLQuake
version. The engine can be used for both watching the "Seal of Nehahra" movie
and for playing the actual game.
WWW: http://planetquake.com/nehahra/
Approved by: garga (mentor)