man/murmurd.1: add paragraph about what disabling SuperUser means.
man/murmurd.1: add paragraph about what disabling SuperUser means.

Lartza/mumble,LuAPi/mumble,SuperNascher/mumble,SuperNascher/mumble,SuperNascher/mumble,LuAPi/mumble,LuAPi/mumble,Lartza/mumble,Lartza/mumble,LuAPi/mumble,LuAPi/mumble,Lartza/mumble,Lartza/mumble,LuAPi/mumble,Lartza/mumble,SuperNascher/mumble,LuAPi/mumble,Lartza/mumble,SuperNascher/mumble,Lartza/mumble,SuperNascher/mumble,SuperNascher/mumble,LuAPi/mumble,SuperNascher/mumble,LuAPi/mumble,SuperNascher/mumble