Update xmpp-dns to version 0.3.4 / rev 5 via SR 1031969
    
    https://build.opensuse.org/request/show/1031969
    by user jubalh + dimstar_suse
    - Update to 0.3.4:
      * Fix namespace for xmpps-client stream opening (jabber:client
        instead of jabber:server).
      * Add from attribute for server-to-server connection test.