Update to jabberd 2.3.4:

This is a major feature release with a bit of bugfixes.

With this release jabberd2 joins HTTP realm with WebSocket client
connections handling built in C2S module! :-)

Changes:
* Rewrite TLS ephemeral key + cipher handling
* Recover Berkeley DB before opening it
* bcrypt support for PostgreSQL
* Option to set authreg module per realm
* AuthReg ANONYMOUS does not offer password check
* Answer to disco#info queries to user JID
* WebSocket C2S SX plugin

Note: websockets are not available, as the required http-parser module
is not (yet) in pkgsrc.

(schnoebe)