Executes a remote procedure call that is sent to all locally
    connected networks using the broadcast address.
    Format
      #include  <rpc/rpc.h>
      enum clnt_stat  clnt_broadcast(u_long prognum, u_long versnum,
                      u_long procnum, xdrproc_t inproc, char * in,
                      xdrproc_t outproc, char * out, resultproc_t
                      eachresult);