NEWS update for 3.4.3 release.
Post-release version bump.
Bug 678321 - Bug in usage of signed/unsigned crashes downloading of GAL
(cherry picked from commit 80c84255f1a212529b0eeccd8831aee64873ef5e)
Bug #679305 - EX addresses not decoded in folder summary
Bug #679303 - Doesn't detect when password has changed
Bug #679305 - EX addresses not decoded in folder summary
Bug #663383 - Doesn't allow to quit
Bug #668555 Crash in ews_cal_sync_items_ready_cb
(cherry picked from commit 54d5b1fdb79ae32db59d40a0241b47ba172ad7e6)
Use EEwsConnection as an argument for e_ews_soup_thread()

It's better for debugging, when checking backtraces, than cnc->priv.
Preset default connection timeout to two minutes (tweak with EWS_CONN_TIMEOUT)

It seems that not setting timeout for libsoup means no timeout at all,
which is not always good to have, thus preset some connection timeout.
Bug #669460 - Can pick freed connection
Bug #673095 - Should call SoupSessionAsync functions in soup thread only
Avoid unref of EEwsConnection in ews_connection_scheduled_cb()

If that's the last reference, then the e_ews_connection_dispose() will try
to wait for the soup_thread, but this is run in soup_thread, thus it cannot
be done and application is aborted on checking for deadlock.
Bug #680153 - Crash under message_info_from_db()
Bug #675442 - Crash in ews_active_job_done()
Bug #656709 - Excessive updates being sent to server
Bug #680525 - Deadlock in calendar when locking priv structure
Bug #665986 - Crash when failed to get a message from a server
Revert extra parts of patch for bug #665986

It caused false errors on message send.
Bug #680683 - Do not block factory's main thread