Fix typo.
Fix typo.

Suggested by: Dylan McNamee <dylan@aracnet.com>

* subversion/mod_dav_svn/util.c
  (dav_svn_simple_parse_uri): "Unusable", not "Ununsable", in error message.

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