[MERGE][0.90][Bug 133965] PathNotChild, port mismatch with "bzr info" for bzr:// smartserver

[Andrew Bennetts]

Robert Collins wrote:
> Why does only ConnectedTransport get this? udp style protocols have
> url's too...
> 
> -Rob

Because that's where _split_url and _unsplit_url live at the moment.  Probably
that should be changed.  I wanted to keep the patch fairly minimal so that it
could be considered for 0.90 (although perhaps John's fix is more appropriate
for 0.90, because it's truly minimal).

-Andrew.