merge from v2_0branch the actual list of changes that became 2.0.6
merge from v2_0branch the actual list of changes that became 2.0.6


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