merge branch change in, clean up checks for standard headers, check for posix compliance
merge branch change in, clean up checks for standard headers, check for posix compliance


kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1,kongr45gpen/bzflag-import-1