Recommend that all XFailing tests have an associated issue in the tracker.
Recommend that all XFailing tests have an associated issue in the tracker.

* subversion/tests/README: A long overdue recommendation.  Prior to the
  release of 1.7.0 we agreed that XFailing tests should be associated with
  an issue, http://svn.haxx.se/dev/archive-2011-02/0026.shtml, so let's
  make it official.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion