code: public static void addOriginAvps(Message m, MetaData md) {
      // FIXME: check for "userFqnAsUri" ?
      AvpSet set = m.getAvps();
      if (set.getAvp(Avp.ORIGIN_HOST) == null) {
        m.getAvps().addAvp(Avp.ORIGIN_HOST, md.getLocalPeer().getUri().getFQDN(), true, false, true);
      }
      if (set.getAvp(Avp.ORIGIN_REALM) == null) {
        m.getAvps().addAvp(Avp.ORIGIN_REALM, md.getLocalPeer().getRealmName(), true, false, true);
      }
    }
docs: Used to set origin, previously done in MessageParser.
  
  @param m
  @param md