mod_pubsub_serverinfo: Update to use mod_server_info (fixes #1841)
...but only for Prosody trunk users, because 0.12 mod_server_contact_info does
not use the new API in mod_server_info.
-- COMPAT for Openfire sending stream headers without to or from.
module:set_global();
module:hook("s2s-check-certificate", function(event)
local session, host = event.session, event.host;
if not event.host then
(session.log or module._log)("warn", "Invalid stream header, certificate will not be trusted")
session.cert_chain_status = "invalid"
return true
end
end, 100);