queue_repair can be used to check or correct most corruptions of the queue
in qmail (resulting from filesystem damage, etc). Functionality includes
automatic, dynamic determination of UIDs and GIDs. Automatic, dynamic
determination of use of big-todo. Handles basic tasks like fixing a queue
restored from backups, incorrect ownership or permissions of directories and
files, missing or extra split subdirectories, unexpected files or other
directories, or creating a valid queue from scratch.