[ticket/12325] Automatic update should notify about outdated files

PHPBB3-12325
[ticket/12325] Fix: it's not stuck in an inifinite loop anymore

PHPBB3-12325
[ticket/12325] Don't use L_COLON

PHPBB3-12325
[ticket/12325] Fix: add a missing colon

PHPBB3-12325
[ticket/12325] Update coding style in template

PHPBB3-12325
[ticket/12325] Fix the language var name

PHPBB3-12325
[ticket/12196] Fix typo "referer" in acp/attachments

PHPBB3-12196
Merge remote-tracking branch 'nickvergessen/ticket/12196' into develop-olympus

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/ticket/12196:
  [ticket/12196] Fix typo "referer" in acp/attachments
Merge branch 'develop-olympus' into develop-ascraeus

# By Joas Schilling
# Via Dhruv (1) and Joas Schilling (1)
* develop-olympus:
  [ticket/12196] Fix typo "referer" in acp/attachments
Merge branch 'develop-ascraeus' into develop

# By Joas Schilling
# Via Dhruv (2) and Joas Schilling (1)
* develop-ascraeus:
  [ticket/12196] Fix typo "referer" in acp/attachments
[ticket/12773] Fix language variable name in cli extension enable command

PHPBB3-12773
[ticket/12196] Revert Fix typo "referer" in acp/attachments

This reverts commit 9bc1f7924d5ef00fb988b81347d4c5c730b25eb2.
https://tracker.phpbb.com/browse/PHPBB3-12196

PHPBB3-12196
Merge pull request #2662 from dhruvgoel92/ticket/12196

[ticket/12196] Revert Fix typo "referer" in acp/attachments

* dhruvgoel92/ticket/12196:
  [ticket/12196] Revert Fix typo "referer" in acp/attachments
Merge branch 'develop-olympus' into develop-ascraeus

* develop-olympus:
  [ticket/12196] Revert Fix typo "referer" in acp/attachments
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12196] Revert Fix typo "referer" in acp/attachments
[ticket/12196] Fix typo in "referrer"

Referer is a typo in the HTTP RFC and should not be used in the UI

PHPBB3-12196
Merge pull request #2661 from n-aleha/ticket/12773

[ticket/12773] Fix language variable name in cli extension enable command

* n-aleha/ticket/12773:
  [ticket/12773] Fix language variable name in cli extension enable command
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12773] Fix language variable name in cli extension enable command
Merge pull request #2665 from nickvergessen/ticket/12196-ascraeus

[ticket/12196] Fix typo in "referrer"

* nickvergessen/ticket/12196-ascraeus:
  [ticket/12196] Fix typo in "referrer"
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12196] Fix typo in "referrer"