Fix XFail conditional on issue #3657 test.
Fix XFail conditional on issue #3657 test.

* subversion/tests/cmdline/merge_tests.py
  (test_list): dav_skelta_mode_causes_spurious_conflicts should fail over
   dav providers regardless of platform, this isn't a windows only issue
   any more (not that it ever really was, but the test was initially
   written that way).

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