Gajim will do HTTP CONNECT on proxy to reach the BOSH Conn manager and try
  to estabilish TLS (same as what firefox do when approaching HTTPS server via
  proxy)
- moved proxy-connecting code to xmpp/proxy_connectors.py
- debugged SOCKS5 proxy code
- tested with Tigase server

  derived (was plugged to NonBlockingClient which made it unusable for BOSH)
- Fixed HTTP CONNECT proxy socket
- Implemented workaround for the bug with insecure-connection warning dialog
  (unfortunately, this is not over - I just forbid the transport to send
  BOSH empty bodies until auth module is plugged, which is wrong and will
  break if user will wait more than "inactivity" (usualy thirty) seconds
  before clicking the dialog.
  This workaround works with ejb and opf, and also breaks connection with
  both of them if delay is too long.
- Implemented basic TLS over BOSH. It works only with OPF and poorly.

- improved HTTP persistent connections
- added alarm-unregister method to idlequeue
- extended proxy managing dialog for BOSH proxy

persistent HTTP connections in BOSH roughly implemented, added hack for openfire incapability of after-SASL-stream-restart-response in BOSH, changed doubles quotes to single

BOSHClient transformed to NonBlockingBOSH transport - it's easier to maintain more connections from below, implemented handling of non-persistent HTTP connections - it runs with ejabberd, improved NonBlockingTransport interface, minor changes in BOSHDispatcher

new BOSHDispatcher (in dispatcher_nb), improved BOSHClient class, minor changes in other xmpp modules

moved bosh code from client_nb.py to bosh.py, replaced debug logging with debug.py by logging in whole xmpppy (debug.py is now unused)

moved TLS and SSL classes from transports_nb to new tls_nb module, fixed HTTP CONNECT proxy transport

in Client now
- Added NonBlockingHttpBOSH transport (to tranports_nb) and BOSHClient
(to client_nb)
- Extended possible proxy types in configuration by "BOSH" proxy
- Rewrote NonBlockingTLS to invoke success callback only after successful TLS handshake is over (formerly, the TLS Plugin returned right after sending <starttls>)

added prototype of BOSHClient class and script for usage example, removed import of common.gajim from transports_nb

 * always adjust account toggle state
 * try to eliminate extra adjustmants to group state
 * small function renaming

make pep work, move config options per account, make publish_tune configurable in account context menu. fixes #3954

Evens were not properly removed.

 * update documentation and fix indentation
 * don't remove offline contacts from roster when we open the last pending, non chat message event
 * store account and jid per event

auto_join_bookmarks only join non-opened groupchats. Opened one are already auto-joined on re-connection. Fixes #3891

fix tooltip about logging encrypting messages. (it is now shorter, better understood (jargon removed where possible), and we it's OpenPGP and not just GPG guys {or last time I checked :$})