prosodyctl check dns: Check for Direct TLS SRV records even if not configured (fix #1793) Existing such records may cause timeouts or errors in clients and servers trying to connect, despite prosodyctl check saying all is well

local xpcall = xpcall;

if select(2, xpcall(function (x) return x end, function () end,  "test")) ~= "test" then
	xpcall = require"util.compat".xpcall;
end

return {
	xpcall = xpcall;
};