Enforce name-addr syntax usage in From/To/Contact

[ibc]

In From/To/Contact always use name-addr format regardless there is display-name or not. A SIP URI allows ":" in a UR param value, but if such a URI appears in a header allowing name-addr/spec-addr like header (To/From/Contact/) then the URI must be enclposed between < > (so name-addr format is required).

Also do it in Contact within the new ua.contact.toString(anonymous=false) mechanism. I would suggest that such a toString method ALWAYS returns a name-addr style Contact value, so if you need to pass ;ob to the URI do it by passing some kind of optional argument to contact.toString() method:

ua.contact.toStrking({
  anynomous: true,
  outbound: true   // this would add ";ob" in Contact URI params
});