Do not establish S2S when not accepting S2S of the same type

The DirectTLS-based server-to-server port (5270 in our defaults) can be disabled, meaning that Openfire won't allow remote domains to connect over 5270.

When that's configured, we shouldn't ourselves try to establish s2s over directTLS either.

The same should go for non-Direct TLS. Basically, when we’re not accepting S2S, we shouldn’t be trying to establish it either.