[ticket/12594] Fix file headers of new files

PHPBB3-12594
[ticket/12594] Update file header in non-php files

PHPBB3-12594
Merge pull request #2520 from nickvergessen/ticket/12594

[ticket/12594] Fix file headers of new files

* nickvergessen/ticket/12594:
  [ticket/12594] Update file header in non-php files
  [ticket/12594] Fix file headers of new files
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12594] Update file header in non-php files
  [ticket/12594] Fix file headers of new files