[ticket/12961] Add link in anti-spam ACP page to titania

PHPBB3-12961
[ticket/12961] Change url to https://www.phpbb.com/go/anti-spam/

PHPBB3-12961
[ticket/12961] Change url to anti-spam-ext

As per IRC suggestion

PHPBB3-12961
[ticket/12961] Refactor lang entry

PHPBB3-12961
[ticket/12961] Move link to language file

PHPBB3-12961
[ticket/12961] Add additional link to the KB

PHPBB3-12961
[ticket/12961] Remove target="_blank" and switch to <strong>

PHPBB3-12961
[ticket/12961] Fix missing phpBB.com

Don't know how that happened. Weird

PHPBB3-12961
[ticket/12961] Shorten ext-db link text

PHPBB3-12961
[ticket/13022] Condition Return to advanced search link

PHPBB3-13022
[ticket/13022] Remove ternary condition

PHPBB3-13022
[ticket/13022] Language adjustments

PHPBB3-13022
[ticket/13061] Replace the service event.subscriber_loader by a compiler pass

PHPBB3-13061
[ticket/13062] Add viewforum.php core event to modify topic ids sql query

Event request: http://area51.phpbb.com/phpBB/viewtopic.php?f=111&t=45383

PHPBB3-13062
[ticket/13064] Validate the migrations provided to migrator::set_migrations()

PHPBB3-13064
[ticket/13044] Correct Expires headers

PHPBB3-13044
[ticket/13044] move GMT string out of gmdate()

PHPBB3-13044
[ticket/13044] \G\M\T to GMT in whole project

Note that there are more uses of "\G\M\T" in vendor files.

PHPBB3-13044
[ticket/13044] Move GMT out of gmdate()

PHPBB3-13044
[ticket/13044] Move GMT out of gmdate in functions_acp

PHPBB3-13044