Пакет checksumgen: Информация

- Make CHKSUMPATH be 'chksum' by default.
- Added --init option (and others) to initialize the checksum
  Git repository.
- checksumbot: Fix: Don't show last commit if no new commit was made.

- Make data processing independent of the current locale
  (Fixes: OVE-20251218-0001).
- Fixed sum_files.sh: Skip find in the case of an empty $INCLUDE.

- Untabify all help pages.
- checksumbot: Added --cb option to override CHKSUMBRANCH
  configuration option.
- checksumgen: Fixed shellcheck SC2317.