better default BUILD_SOURCE..; added BZ_BUILD_USER to allow reporting who made a build
better default BUILD_SOURCE..; added BZ_BUILD_USER to allow reporting who made a build


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