[ticket/10325] add logout function in functional_test_case

PHPBB3-10325
[ticket/10325] functional tests for forgot password functionality

PHPBB3-10325
[ticket/11435] Fix comments in events test

PHPBB3-11435
[ticket/11435] Create test to make sure template/event output is equal

PHPBB3-11435
[ticket/11495] Fix comments and package docs

PHPBB3-11495
Merge remote-tracking branch 'remotes/cyberalien/ticket/4412' into develop
Merge remote-tracking branch 'remotes/cyberalien/ticket/11275' into develop
[ticket/11495] Make method names for add/remove more descriptive

PHPBB3-11495
[ticket/11495] Fix doc blocks once more

PHPBB3-11495
Merge PR #1370 branch 'EXreaction/ticket/11237' into develop

# By Nathaniel Guse
# Via Nathaniel Guse
* EXreaction/ticket/11237:
  [ticket/11237] Fix PHP error in acp_prune.php
Merge PR #1371 branch 'EXreaction/ticket/11236' into develop

# By Nathaniel Guse
# Via Nathaniel Guse
* EXreaction/ticket/11236:
  [ticket/11236] Change PRUNE_USERS_GROUP_EXPLAIN language
  [ticket/11236] Do not require group selection in prune users
  [ticket/11236] Correct HTML
[ticket/10820] Image downloader recognize new version of ie
When a user download image attachement using ie8, the file is displayed.
However, when he uses ie version greater than 8, the image is download.
A changes are made to phpbb/download/file.php to solve the problem.
We check now if the ie version is greater or equal to 8 and not only equal
to 8

PHPBB3-10820
[ticket/10820] proper usage of global and local variable browser

PHPBB3-10820
[ticket/10820] fix IE check function

Add phpbb_ prefix to function name and return boolean value.

PHPBB3-10820
[ticket/10820] add function docblock

PHPBB3-10820
[ticket/10820] remove unnecessary condition checks

PHPBB3-10820
[ticket/10820] Use singular return

PHPBB3-10820
[ticket/10820] simplify regex and escape dot

PHPBB3-10820
[ticket/10820] add param and return to function

Add param and return in function docblock. Rename function
parameter to $user_agent.

PHPBB3-10820
[ticket/10820] fix docblock

PHPBB3-10820