* Fix IDLE mode regression (it didn't worked) introduced
after v6.5.5 (pointy hat goes to Eygene Ryabinkin, kudos --
to Tomasz Żok)
* Add knob to invoke folderfilter dynamically on each sync (GitHub#73)
* Add knob to apply compression to IMAP connections (Abdó Roig-Maranges)
* Add knob to filter some headers before uploading message
to IMAP server (Abdó Roig-Maranges)
* Allow to sync GMail labels and implement GmailMaildir repository that
adds mechanics to change message labels (Abdó Roig-Maranges)
* Allow to migrate status data across differend backends
(Abdó Roig-Maranges)
* Support XDG Base Directory Specification
(if $XDG_CONFIG_HOME/offlineimap/config exists, use it as the
default configuration path; ~/.offlineimaprc is still tried after
XDG location) (GitHub#32)
* Allow multiple certificate fingerprints to be specified inside
'cert_fingerprint'
ecc1fd1b4f