certmanager: Add more debug logging around cert indexing Currently it's not obvious which directories have been indexed (especially when the resulting index is empty), or why certain files have been skipped.

local xpcall = xpcall;

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

return {
	xpcall = xpcall;
};