v64: Version 64 (September 2, 2023)
------------------------------ * Fixed broken installation when upgrading from Mail-in-a-Box version 56 (Nextcloud 22) and earlier because of an upstream packaging issue. * Fixed backups to work with the latest duplicity package which was not backwards compatible. * Fixed setting B2 as a backup target with a slash in the application key. * Turned off OpenDMARC diagnostic reports sent in response to incoming mail. * Fixed some crashes when using an unrelased version of Mail-in-a-Box. * Added z-push administration scripts.