SSL: add const_cast to be compatible with OpenSSL 0.9.8.
SSL: add const_cast to be compatible with OpenSSL 0.9.8.

LuAPi/mumble,LuAPi/mumble,LuAPi/mumble,SuperNascher/mumble,austinliou/mumble,LuAPi/mumble,SuperNascher/mumble,Lartza/mumble,Lartza/mumble,unascribed/mumble,Lartza/mumble,SuperNascher/mumble,unascribed/mumble,SuperNascher/mumble,SuperNascher/mumble,unascribed/mumble,SuperNascher/mumble,LuAPi/mumble,austinliou/mumble,austinliou/mumble,Lartza/mumble,SuperNascher/mumble,Lartza/mumble,austinliou/mumble,Lartza/mumble,unascribed/mumble,Lartza/mumble,austinliou/mumble,unascribed/mumble,austinliou/mumble,austinliou/mumble,LuAPi/mumble,unascribed/mumble,SuperNascher/mumble,unascribed/mumble,LuAPi/mumble,austinliou/mumble,LuAPi/mumble,SuperNascher/mumble,Lartza/mumble,unascribed/mumble,LuAPi/mumble