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

-- Compatibility with clients that set 'to' on resource bind requests
--
-- http://xmpp.org/rfcs/rfc3920.html#bind
-- http://xmpp.org/rfcs/rfc6120.html#bind-servergen-success

local st = require "util.stanza";

module:hook("iq/host/urn:ietf:params:xml:ns:xmpp-bind:bind", function(event)
	local fixed_stanza = st.clone(event.stanza);
	fixed_stanza.attr.to = nil;
	prosody.core_process_stanza(event.origin, fixed_stanza);
	return true;
end);