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-Stable'
summary: 'Close idle server-to-server connections'
...

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

Some people find it preferable to close server-to-server connections
after they have been silent for a while.

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

...is trivial. The default timeout is 300 seconds (5 minutes). To change
this simply put in the config:

       s2s_idle_timeout = 60 -- or any other number of seconds

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

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  0.6   Works
  0.7   Works
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