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'

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labels:
- 'Stage-Beta'
summary: 'XEP-0319 compatibility module'
...

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

This module adds [XEP-0319](http://xmpp.org/extensions/xep-0319.html)
idle tags to presence stanzas containing [XEP-0012: Last
Activity](http://xmpp.org/extensions/xep-0012.html) tags for idle
indication (e.g. supported by libpurple clients). It works on outgoing
and incoming presence stanzas.

Install and enable it like any other module. It has no configuration.

Compatibility
=============

  ------- -------
  trunk   Works
  0.9     Works
  ------- -------