Revision 1673065

Follow up r1673044, avoid parsing certificates multiple times.

* subversion/svn/auth-cmd.c
  (match_certificate): pass the certinfo back to the caller and
    allocate it in a result_pool.
  (match_credential): Add parameters to pass into match_certificate()
    and adjust the match_certificate() calls.
  (show_cert): Add a certinfo argument and shortcut parsing if the
    certinfo is already filled.
  (list_credential): Add a certinfo argument to pass into show_cert()
    and adjust show_cert() call.
  (walk_credentials): Adjust calls to match_credential() and 
    list_credential() accordingly.