[ticket/11409] Add success message after updating group position settings

PHPBB3-11409
Merge remote-tracking branch 'EXreaction/ticket/11387' into develop

* EXreaction/ticket/11387:
  [ticket/11387] Log module added only after it has been added
Merge remote-tracking branch 'Elsensee/ticket/11409' into develop

* Elsensee/ticket/11409:
  [ticket/11409] Add success message after updating group position settings
[ticket/11583] Allow FULLTEXT indexes on InnoDB when on MySQL 5.6.4 or higher.

PHPBB3-11583
Merge remote-tracking branch 'nickvergessen/ticket/11549' into develop

* nickvergessen/ticket/11549:
  [ticket/11549] Add functional test for ACP Extension Module with Template
  [ticket/11549] Do not set extension dir path for style in adm/index.php
[ticket/10840] Add check_form_key to acp_groups.php

PHPBB3-10840
[ticket/11122] Remove Oleg and igorw from active authors

PHPBB3-11122
[ticket/11122] Add dhruv to active authors

PHPBB3-11122
[ticket/8319] Prepend Board URL to LOCAL_URL links to prevent abuse

The description says:
"The URL must be relative to the topic page and cannot contain a server name
or protocol."
We now enforce this and will add a new token with the current behaviour back.

PHPBB3-8319
[ticket/8319] Add new token RELATIVE_URL to allow foreign relative URL parts

PHPBB3-8319
[ticket/8319] Update BBCodes that currently use the LOCAL_URL tag on update

To fix http://tracker.phpbb.com/browse/PHPBB3-8319 we changed the
second_pass_replace value, so that needs updating for existing ones.

PHPBB3-8319
[ticket/8319] Add explanation for RELATIVE_URL and update LOCAL_URL

The explanation now states that links are prefixed with the board URL.

PHPBB3-8319
Merge remote-tracking branch 'nickvergessen/ticket/11122-2' into develop-olympus

* nickvergessen/ticket/11122-2:
  [ticket/11122] Add dhruv to active authors
  [ticket/11122] Remove Oleg and igorw from active authors
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11122] Add dhruv to active authors
  [ticket/11122] Remove Oleg and igorw from active authors
[ticket/11583] Use a new lang key instead of giving the old one a new meaning.

PHPBB3-11583
Merge remote-tracking branch 'nickvergessen/ticket/10840' into develop-olympus

* nickvergessen/ticket/10840:
  [ticket/10840] Add check_form_key to acp_groups.php
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/10840] Add check_form_key to acp_groups.php
Merge remote-tracking branch 'erangamapa/ticket/11145' into develop-olympus

* erangamapa/ticket/11145:
  [ticket/11145] Wrong error thrown when uploading a bigger image.
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/11145] Wrong error thrown when uploading a bigger image.
[ticket/11579] Use test case helper class and use assert prefix for method

PHPBB3-11579