Support ERR_NOUSERWHISPER

[realJoshByrnes]

something like the following (untested) should work

ctcp *:ERR:?:{
  if ($1- == NOUSERWHISPER) {
    var %msg = * $nick has private messages disabled
    if ($window($nick)) {
      echo $color(info) $ifmatch msg
    } else {
      var %i = 1
      while (%i <= $comchan($nick, 0)) {
        echo $color(info) $comchan($nick, %i) %msg
      }
    }
  }
}