- Removed non-functional stream-based compression in favor of HTTP
transport compression (per spec
http://xmpp.org/extensions/xep-0206.html#create).
- Prevent runaway session initiation storms (via strophe) by returning a
400 HTTP error if a client attempts to deliver stanza(s) without a valid
sid (per spec http://xmpp.org/extensions/xep-0124.html#session-request).
- Use maxRequests to determine how many pending stanzas to preserve
while enabling delivery via multiple BOSH connections (per spec
http://xmpp.org/extensions/xep-0124.html#rids-broken)