[Serdev] enum patch for multiple services and compound naptrs

[Juha Heinanen]

Klaus Darilion writes:

 > The current patch is against 0.9. If it will be accepted, I will make a 
 > patch for CVS-head extend the documentation too.

please make a patch (including documentation patch) against CVS HEAD and
i'll commit it.

 > +    /* RFC 3761, NAPTR service field must start with E2U+ */

"normal" case also checks for sip+e2u, because some clients were using
the old format.  perhaps it is now safe to remove sip+e2u support
altogether.

-- juha