* Added documentation in the user guide for delta restores, expiration, dedicated backup hosts, starting and stopping pgBackRest, and replication.
* Fixed an issue where the start/stop commands required the --config option.
* Fixed an issue where log files were being overwritten instead of appended.
* Fixed an issue where backup-user was not optional.
* Symlinks are no longer created in backup directories in the repository. These symlinks could point virtually anywhere and potentially be dangerous. Symlinks are still recreated during a restore.
* Added better messaging for backup expiration. Full and differential backup expirations are logged on a single line along with a list of all dependent backups expired.
* Archive retention is automatically set to full backup retention if not explicitly configured.
* Added a new user guide that covers pgBackRest basics and some advanced topics including PITR. Much more to come, but it's a start.
* The website, markdown, and command-line help are now all generated from the same XML source.
* The backup_label.old and recovery.done files are now excluded from backups.
