mod_roster_command: Fix subscription when the "user JID" is a bare domain. Do not attempt to update the roster when the user is bare domain (e.g. a component), since they don't have rosters and the attempt results in an error: $ prosodyctl mod_roster_command subscribe proxy.example.com contact@example.com xxxxxxxxxxFailed to execute command: Error: /usr/lib/prosody/core/rostermanager.lua:104: attempt to concatenate local 'username' (a nil value) stack traceback: /usr/lib/prosody/core/rostermanager.lua:104: in function 'load_roster' /usr/lib/prosody/core/rostermanager.lua:305: in function 'set_contact_pending_out' mod_roster_command.lua:44: in function 'subscribe'

---
labels:
- 'Stage-Beta'
summary: Sequential MOTD messages
...

Introduction
============

mod\_motd\_sequential is a variant of
[mod\_motd](https://prosody.im/doc/modules/mod_motd) that lets you
specify a sequence of MOTD messages instead of a single static one. Each
message is only sent once and the module keeps track of who as seen
which message.

Configuration
=============

``` lua
modules_enabled = {
  -- other modules
    "motd_sequential";
}
motd_sequential_messages = {
  "Hello and welcome to our service!", -- First login
  "Lorem ipsum dolor sit amet", -- Second time they login
  -- Add more messages here.
}
```