mod_http_oauth2: Reuse JWT issuance time as substitute for auth time
Makes the token shorter. Since iat and auth_time are generated at about
the same time they would only differ by a few microseconds anyway.
module:set_global();
local traceback = require "util.debug".traceback;
require"util.signal".signal(module:get_option_string(module.name, "SIGUSR1"), function ()
module:log("info", "Received SIGUSR1, writing traceback");
local f = io.open(prosody.paths.data.."/traceback.txt", "a+");
f:write(traceback(), "\n");
f:close();
end);