[Operators] requiring channel encryption

[gloox at iera.de]

hi,
great idea! i run a small jabber server(50 accounts). it requires starttls or 
oldssl for c2s. for s2s i accept everything as sadly i have to be compatible.

possible problematic clients are: kopete(only oldssl), miranda(you have to 
install openssl seperately afaik and its a hard task for many windows users).

but i think there are a bunch of servers which do not have s2s starttls, i 
think for example googlemail and jabber.cc do not.

i would really appreciate this!
greetings martin