Add a regression test for #2557 (and, indirectly, #3987).
Add a regression test for #2557 (and, indirectly, #3987).

* subversion/tests/cmdline/special_tests.py
  (symlink_to_wc): New test, on POSIX only.
  (test_list): Run it.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1158196 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion