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: 'Privacy lists (XEP-0016) support'
...

Introduction
------------

Privacy lists are a flexible method for blocking communications.

Originally known as mod\_privacy and bundled with Prosody, this module
is being phased out in favour of the newer simpler blocking (XEP-0191)
protocol, implemented in [mod\_blocklist][doc:modules:mod_blocklist].

Configuration
-------------

None. Each user can specify their privacy lists using their client (if
it supports XEP-0016).

Compatibility
-------------

  ------ -------
  0.9    Works
  0.10   Works
  ------ -------