Bug with URI copying in strict routing handling

[bennylp]

Ryder Rishel <ryderblue-NO at SPAM-gmail.com> points out bug with URI copying when handling strict-route request. It manifests itself in a double "<<" characters in the Route header of outgoing requests sent by pjsip:

Route: <<sip:pjsip-perf@192.168.2.47:5060;transport=udp>>

[bennylp]

The bug is caused by a name-addr of a request target being assigned as the URI of the name-addr of the Route header in pjsip_get_request_addr(), causing multiple name-addr containment.

This has been fixed in r938.

Thanks much Ryder Rishel for investigating and fixing this problem!

[bennylp]

In r939:

made name_addr handling more robust against possibility of bugs that someone may put another name_addr inside a name_addr, by making pjsip_name_get_uri() calls pjsip_uri_get_uri(nameaddr->uri) rather than just returning nameaddr->uri.