Borg 2.0 beta (deduplicating backup program with compression and encryption)

The Borg 2.0 release brings significant changes and improvements. It is a breaking release, not directly compatible with Borg 1.x repositories, requiring script reviews and adaptations. However, users can efficiently transfer archives from old repositories to new ones using "borg transfer." The update focuses on enhancing security, speed, and simplicity by introducing new cryptographic methods and session keys. The release also includes multi-repo enhancements, command line interface cleanups, and new features like retries for input files and support for Unix domain sockets. Additionally, the update removes deprecated options, improves data format processing, and requires Python 3.9 as a minimum requirement. The release aims to make Borg more secure, faster, and easier to use, paving the way for future features and applications. Borg 2.0 signifies a significant step forward in the evolution of the Borg backup tool, streamlining operations and enhancing overall performance.