If a peer uses any transport other than UDP, then MWI will

If a peer uses any transport other than UDP, then MWI will
fail for that peer since sip_alloc will allocate a sip_pvt with
a default transport of UDP. This change resets the socket type
immediately after allocating the sip_pvt in sip_send_mwi_from_peer,
so that the proceeding call to create_addr_from_peer does not fail
right away. The socket data from the peer is properly copied to
the sip_pvt in create_addr_from_peer.

(closes issue #13710)
Reported by: andrew53
Patches:
      sip_notify_use_tcp.patch uploaded by andrew53 (license 519)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@151428 65c4cc65-6c06-0410-ace0-fbb531ad65f3