[JDEV] Fixed some problems

[Jeremie Miller]

I just fixed the Jabber transport so that it checks for it's own aliases
before it tries to deliver remotely, so messages to someone at localhost will
not be sent to the JabberBox as long as localhost is aliased to the Jabbe
transport.

The Jabber transport also now deals with any delivery problems/errors
generated by JabberBox, so messages to someone at notarealhost.nowhere will
be rejected back to the original author instead of the bit bucket.

I tested everything out and it seemed to run ok, let me know if there are
any problems with tonights(at midnight CST) snapshot.

Jer