fix some nq-server issues.

make trying to close the window shut down properly while debugging.
added r_softwarebanding cvar to approximate 8bit software rendering.
fix issue with invalid skeletal lerps.
external q3 lightmaps now uses IF_NOMIPMAP and respects gl_lightmap_nearest.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4838 fc73d0e0-1445-4013-8a0c-d673dee63da5

engine/server/server.h

@@ -581,6 +581,7 @@ typedef struct client_s
 		//note, nq is nq+
 	} protocol;
 
+	unsigned int lastruncmd;	//for non-qw physics. timestamp they were last run, so switching between physics modes isn't a (significant) cheat
 //speed cheat testing
 #define NEWSPEEDCHEATPROT
 	int msecs;