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'

local jid = require "util.jid";
local st = require "util.stanza";
local admins = module:get_option_inherited_set("admins");
local host = module.host;

module:depends("spam_reporting")

module:hook("spam_reporting/spam-report", function(event)
	local reporter_bare_jid = jid.bare(event.stanza.attr.from)
	local report = reporter_bare_jid.." reported "..event.jid.." as spammer: "..event.reason
	for admin_jid in admins
		do
			module:send(st.message({from=host,
			type="chat",to=admin_jid},
			report));
		end
end)