mod_unified_push: Allow additional CORS headers for unified push (fixes #1985) - Request header "TTL" is mandated by the HTTP Push specification RFC 8030: https://datatracker.ietf.org/doc/html/rfc8030#section-5 - Firefox sends "Content-Encoding" with a HTTP form submission, so it is required when using the Unified Push testing tool at https://unifiedpush.org/test_wp.html (with the full URL being delivered by the UP-Example Android app) Adding both headers makes the Unified Push testing tool work from the browser. Resolves: https://issues.prosody.im/1985

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);