• #959: Fix an error in the Btrfs hook when a subvolume mounted at "/" is configured in borgmatic's
  source directories.
• #960: Fix for archives storing relative source directory paths such that they contain the working
  directory.
• #960: Fix the "spot" check to support relative source directory paths.
• #962: For the ZFS, Btrfs, and LVM hooks, perform path rewriting for excludes and patterns in
  addition to the existing source directories rewriting.
• #962: Under the hood, merge all configured source directories, excludes, and patterns into a
  unified temporary patterns file for passing to Borg. The borgmatic configuration options remain
  unchanged.
• #962: For the LVM hook, add support for nested logical volumes.
• #965: Fix a borgmatic runtime directory error when running the "spot" check with a database hook
  enabled.
• #969: Fix the "restore" action to work on database dumps without a port when a default port is
  present in configuration.
• Fix the "spot" check to no longer consider pipe files within an archive for file comparisons.
• Fix the "spot" check to have a nicer error when there are no source paths to compare.
• Fix auto-excluding of special files (when databases are configured) to support relative source
  directory paths.
• Drop support for Python 3.8, which has been end-of-lifed.