On the svn-auth-x509 branch: Fix ambiguous code.

* subversion/libsvn_subr/x509parse.c
  (is_hostname): Make the parameter const to avoid a warning at a call site.
   Add braces to a conditional statement that was ambiguous because the
   indentation indicated a different intent than the code actually
   implmenented.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1613608 13f79535-47bb-0310-9956-ffa450edef68