Update bind to version 9.18.26 / rev 207 via SR 1169576
    
    https://build.opensuse.org/request/show/1169576
    by user jcronenberg + anag+factory
    - Update to release 9.18.26
      New Features:
      * The statistics channel now includes counters that indicate the
        number of currently connected TCP IPv4/IPv6 clients.
      * Added RESOLVER.ARPA to the built in empty zones.
      Bug Fixes:
      * Changes to listen-on statements were ignored on reconfiguration
        unless the port or interface address was changed, making it
        impossible to change a related listener transport type. That
        issue has been fixed.
      * A bug in the keymgr code unintentionally slowed down some
        DNSSEC key rollovers. This has been fixed.
      * Some ISO 8601 durations were accepted erroneously, leading to
        shorter durations than expected. This has been fixed.