[ticket/12695] Add viewtopic language file for parse_attachments in mcp_post

PHPBB3-12695
Merge pull request #2722 from marc1706/ticket/12695

[ticket/12695] Add viewtopic language file for parse_attachments in mcp_...

* marc1706/ticket/12695:
  [ticket/12695] Add viewtopic language file for parse_attachments in mcp_post
Merge branch 'develop-olympus' into develop-ascraeus

* develop-olympus:
  [ticket/12695] Add viewtopic language file for parse_attachments in mcp_post
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12695] Add viewtopic language file for parse_attachments in mcp_post