[ticket/10325] fix language

PHPBB3-10325
[ticket/10325] change language var

PHPBB3-10325
[ticket/10325] fix language variable

PHPBB3-10325
[ticket/10325] fix language key

PHPBB3-10325
[ticket/10325] improve acp option language

PHPBB3-10325
[ticket/10325] fix language in acp and ucp

PHPBB3-10325
[ticket/11237] Fix PHP error in acp_prune.php

Also making the code a bit more efficient (removing one SQL query)

PHPBB3-11237
[ticket/11495] Use constructor arguments over properties in implementation

PHPBB3-11495
[ticket/11236] Correct HTML

PHPBB3-11236
[ticket/11236] Do not require group selection in prune users

PHPBB3-11236
[ticket/11236] Change PRUNE_USERS_GROUP_EXPLAIN language

PHPBB3-11236
[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
[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