2015-XX-XX v2.0
* getmail_retriever back end mostly rewritten.  Upgrading users see docs!
* getmail_retriever now implements a GetmailRetriever class.  You can
  include this file to use the class in other projects.
* Attempts to detect and disable accounts that fail login attempts, to
  avoid having those accounts trigger security measures on the remote side.
* Errors go to STDERR instead of STDOUT.
* Log files now named for month and day and placed in a logs subdirectory.
* Will automatically gzip compress old log files.
* Can automatically delete old log files.
* getmail-backend.php renamed to getmail-retriever
* getmail-retriever now provides a complete command-line interface.
* $rcmail_config['getmail_locktype'] was incorrectly shown as
  $rcmail_config['getmail_destination_locktype'] in comments in
  config.inc.php.dist

2013-03-17 v1.0
* Initial release.