On svn-auth-x509 branch, fix a thinko.

* subversion/libsvn_subr/x509parse.c
  (x509name_to_utf8_string): Comment should now make sense.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1613533 13f79535-47bb-0310-9956-ffa450edef68