[ticket/11877] Create package links and checksums for announcement via script.

PHPBB3-11877
Merge remote-tracking branch 'remotes/bantu/ticket/11877' into develop-olympus

* remotes/bantu/ticket/11877:
  [ticket/11877] Create package links and checksums for announcement via script.
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11877] Create package links and checksums for announcement via script.