When connecting to an svn+SOMETHING:// ra session, don't store the default port
number directly as that makes it impossible for the tunnel callbacks to see
the difference between an url like svn+ssh://server/something and
svn+ssh://server:3690/something.

* subversion/libsvn_ra_svn/client.c
  (parse_url): Don't apply default port number here...
  (open_session): ... but do it here when opening the socket connection.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1562337 13f79535-47bb-0310-9956-ffa450edef68