Always add both CanonicalAddress and any local address to the invitation URL.

Always add both CanonicalAddress and any local address to the invitation URL.

We don't know in advance if the invitee will be on the LAN or outside
the LAN, and because hairpin routing is not working on many home
routers, it is safer to add all possible addresses.

Also, add the port number to each individual address in the URL, instead
of allowing only one port number.