[ticket/12325] Automatic update should notify about outdated files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/12716] Add the missing parameters in the call of clearToken

PHPBB3-12716
[ticket/12716] Add regression test

PHPBB3-12716
[ticket/12716] Use a string as session_id

PHPBB3-12716
[ticket/12771] Bug in profilefield_base_migration when used in ext

The base migration class should create lang entry for the new CPF
but it is supposed to strip it of phpbb_ prefix. As extensions
CPFs do not use phpbb_ prefix it will not create a lang entry.
This is as simple solution as it can be done.

PHPBB3-12771
[ticket/12772] Remove config_text parameter from message.form.topic

Broke Email topic since the topic_form class doesn't require this to be passed

PHPBB3-12772
[ticket/12771] Change var name

Change var name

PHPBB3-12771
[ticket/12764] Properly handle errors upon connecting to MySQLi database

As the db_connect_id gets set up by mysql_init(), the db_connect_id will be an
object with empty settings instead of just empty. Even if mysql_real_connect()
encounters an error upon connecting, the db_connect_id is still set. This
will result in trying to just access the database which obviously does
nothing.
By setting db_connect_id to an empty string, the script will not try to query
th database and properly handle any errors that occur upon connecting.

PHPBB3-12764
[ticket/12771] Shanging substr to strpos

Logical change ...

PHPBB3-12771
[ticket/12645] Replace support links in SUPPORT_BODY with 3.1 links

PHPBB3-12645
[ticket/12777] Rename extension status functions and add is_configured()

PHPBB3-12777
[ticket/12777] Update doc block of is_configured()

PHPBB3-12777
[ticket/12777] Add is_purged()

PHPBB3-12777
Merge pull request #2493 from Nicofuma/ticket/12325

[ticket/12325] Automatic update should notify about outdated files

* Nicofuma/ticket/12325:
  [ticket/12325] Fix the language var name
  [ticket/12325] Update coding style in template
  [ticket/12325] Fix: add a missing colon
  [ticket/12325] Don't use L_COLON
  [ticket/12325] Fix: it's not stuck in an inifinite loop anymore
  [ticket/12325] Automatic update should notify about outdated files
[ticket/12759] Allow multiple fields to be loaded via get_option_lang

PHPBB3-12759