[ticket/11112] Use https for user-visible links to phpbb.com

PHPBB3-11112
[ticket/11112] Do not change opensource.org link to https

PHPBB3-11112
Merge remote-tracking branch 'github-marc1706/ticket/11112' into prep-release-3.0.12

* github-marc1706/ticket/11112:
  [ticket/11112] Do not change opensource.org link to https
  [ticket/11112] Use https for user-visible links to phpbb.com
Merge branch 'prep-release-3.0.12' into develop-olympus

* prep-release-3.0.12:
  [ticket/11112] Do not change opensource.org link to https
  [ticket/11112] Use https for user-visible links to phpbb.com
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11112] Do not change opensource.org link to https
  [ticket/11112] Use https for user-visible links to phpbb.com

Conflicts:
	phpBB/language/en/install.php
	phpBB/language/en/ucp.php
Merge remote-tracking branch 'github-phpbb/develop' into develop

* github-phpbb/develop:
  [ticket/11687] Add assets_version to phpbb_config