[gimp-web/master] (54 commits) ...Merge remote-tracking branch 'origin/testing'

[Jehan <jehanp src gnome org>]

Summary of changes:

  1fa1e12... plugins: use mirrors.json and display pretty organization n (*)
  597ec4c... themes: update the text introducing mirrors. (*)
  8d17f0f... content: update the sponsors page. (*)
  7c6d99f... content, plugins: add the mirror list in the sponsors page. (*)
  a76cdf3... themes: remove download list from various download pages. (*)
  512d148... content, plugins: improve the country verification for mirr (*)
  174b194... plugins: testing a different rendering for the mirror spons (*)
  c4ef01e... plugins: get back a per-country listing with location detai (*)
  12b6115... content, plugins: adding a way to ignore known geoip discre (*)
  281d705... content: adding the new "Astra ISP" mirror in mirrors.json  (*)
  a0ff729... content, plugins, tools: some cleaning of mirrors2.json ref (*)
  4b0435b... tools: add --verify-checksum option to gimp-check-mirrors.p (*)
  935523d... tools: return error code for gimp-check-mirrors.py. (*)
  c476dcf... content, tools: new mirror in Germany: dogado GmbH (*)
  1138214... content: new mirror policy news. (*)
  85ee3b0... content: update sponsor page and news. (*)
  ff64a32... tools: update mirror verification scripts. (*)
  40217e2... content, tools: update mirror lists with last scripts. (*)
  22ad74d... content: add a "Contributors" section to the mirror news. (*)
  e416485... themes: move the checksum hash of tarballs into a <details> (*)
  c546ce6... themes: less messy (hopefully) download page. (*)
  55084b6... Add warning about windows store versions (*)
  3fb6e9a... Change macOS name from OS X (*)
  6a213c4... themes: replace the color style by <strong> + warning emoti (*)
  4e7eb65... themes: more Windows/Apple fixes in download page. (*)
  8e9fb82... content: improve the "Selling GIMP" page. (*)
  77ab904... gitlab-ci: add mirror consistency check. (*)
  d69e11c... tools: improve gimp-check-mirrors.py. (*)
  ba3bab4... gitlab-ci: check mirror contents. (*)
  89abb31... gitlab-ci: install python3-requests. (*)
  e718791... content, tools: new cu.be mirror. (*)
  b18908b... content: mirror news update. (*)
  b90cfba... devel-docs: new docs for developers/maintainers/admins abou (*)
  ed1a1a9... content: add a warning about outdated book list and how to  (*)
  274e0ec... content: a bit more update on books page. (*)
  e3d7520... content: improve a bit "Participate" section. (*)
  af72898... themes: add a "Sponsors" link in bottom page template. (*)
  22a32dd... content: update mirror news. (*)
  dc727cb... content, tools: adding mirror of eScience Center, Nanjing U (*)
  da092f7... Update various files to be about Python 3 only. (*)
  39c8390... content, tools: adding mirror by Nizhny Novgorod. (*)
  95cd853... content, tools: IP-Connect LLC created a second mirror… (*)
  7393490... devel-docs: update the mirror howto with a verification ste (*)
  e32ee05... content, tools: new mirror nbshare.io. (*)
  68192af... content: new image for mirror page. (*)
  20ad016... content: updating mirror news and sponsors page. (*)
  236dd7c... devel-docs: add a verification steps to the mirror procedur (*)
  f27ec7e... devel-docs: written mirror procedure update. (*)
  bd22e01... content: update news and sponsors page. (*)
  cfddc3a... devel-docs: update mirror procedure. (*)
  d6b4a4d... themes: add metadata image support for news article. (*)
  0bb9788... content: use the illustration for this news as metadata ima (*)
  41e185e... content: use numeric list for the mirror procedure. (*)
  adbfc39... Merge remote-tracking branch 'origin/testing'

(*) This commit already existed in another branch; no separate mail sent