mod_pubsub_serverinfo: Fix check for local domain The module was checking whether a host exists, but this may be misleading if our host is loaded before the host that is being checked. This change makes it check the config. This will provide a false positive in the rare case that the host is defined but not activated/enabled. But we don't have an API currently for "is this host configured and enabled?"

module:set_global();

local traceback = require "util.debug".traceback;

local signal = module:get_option_string(module.name, "SIGUSR1");
module:hook("signal/" .. signal, function()
	module:log("info", "Received %s, writing traceback", signal);
	local f = io.open(prosody.paths.data .. "/traceback.txt", "a+");
	f:write(traceback(), "\n");
	f:close();
end);