v2.0.21

• Added: The dashboard's commit log has pages, so the whole history can be browsed: first,
  previous, the page numbers (the administration's shared pager), next and last, with "Showing
  x–y of z commits" and a page size of 10, 25, 50 or 100, kept as the user preference
  admin_git_manager_log_limit (50 until one is chosen). A page is git log --skip --max-count
  and the total git rev-list --count, so a long history is never read as a whole.
• Added: The log filters by branch or tag, author and text in the message (fixed text, any case),
  besides the dates. The page, its size and the filters are view parameters
  (/(offset)/50/(limit)/25/(ref)/main/(author)/jane/(grep)/fix/(since)/2026-01-01/(until)/...),
  so a link reproduces the view; the form redirects to that address. Values are written into a
  link as ~XX for any character other than letters, digits, dot, dash, underscore and @.
• Updated: Every value reaches git as an argument of its own, without a shell
  (GitManager::git()), after a check (GitManagerLog): a branch or tag must be one of the
  repository's refs (for-each-ref), the revision stands between --end-of-options and --, dates
  must be real days, texts lose control characters and are cut at 200 characters.
• Updated: The filter no longer lives in the session; "Clear" is a link to the unfiltered log.
  "Last commit" in the HEAD card is HEAD's own date, whichever page is shown.
• Added: tests/unit/LogPagingTest.php (the paging maths, the view parameters and the git
  arguments, hostile values included). The new strings are translated in eng-US, ger-DE, esl-ES,
  esl-MX, heb-IL, lat-VA and tlh-QO.