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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summary: S2S connection override
...

# Introduction

This module is similar to [mod\_srvinjection] but less of an hack.

# Configuration

``` lua
-- In the global section

modules_enabled = {
    --- your other modules
    "s2soutinjection";
}

s2s_connect_overrides = {
    -- This one will use the default port, 5269
    ["example.com"] = "xmpp.server.local";

    -- To set a different port:
    ["another.example"] = { "non-standard-port.example", 9999 };
}
```

# Compatibility

Requires 0.9.x or later.