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 mime_map = module:shared("/*/http_files/mime").types or {
	css = "text/css",
	js = "application/javascript",
};

local serve;
if not pcall(function ()
	local http_files = require "net.http.files";
	serve = http_files.serve;
end) then
	serve = module:depends"http_files".serve;
end

local libjs_path = module:get_option_string("libjs_path", "/usr/share/javascript");

module:provides("http", {
		default_path = "/share";
		route = {
			["GET /*"] = serve({ path = libjs_path, mime_map = mime_map });
		}
	});