[ticket/13266] Enable twig dump function

PHPBB3-13266
[ticket/13357] Adds missing LOG_MOVED_TOPIC for 3.0.12 left-over entries

PHPBB3-13357
[ticket/11033] Update string to reflect real requirements

PHPBB3-11033
[ticket/12924] Make meta tags self-closing

PHPBB3-12924
[ticket/12924] Remove newlines at the EOF

PHPBB3-12924
[ticket/13368] Add $forum_data to viewforum_get_topic_ids_data event

PHPBB3-13368
[ticket/13368] Add @changed entry

PHPBB3-13368
[ticket/13312] Add event core.acp_email_send_before

PHPBB3-13312
[ticket/13312] Use empty for usernames array

PHPBB3-13312
[ticket/13406] Add a space between the index name and columns list

Currently there's no space between the index name and columns list
when generating ADD INDEX sql query for MySQL DBMSes. This may cause errors
on earlier MySQL versions like 3.23.

PHPBB3-13406
[ticket/13158] Allow adding extra auth checks when the user is posting

PHPBB3-13158
[ticket/13159] Allow to do extra auth checks on report posting

PHPBB3-13159
[ticket/13409] Add event core.search_modify_param_before

PHPBB3-13409
[ticket/13409] Fix event name

PHPBB3-13409
[ticket/13409] Change search_id type and release version

PHPBB3-13409
[ticket/13419] Add the lowermost template event

PHPBB3-13419
[ticket/13370] Allow calling class method in convertor framework directly.

This change allows the usage of array($class, 'method')) directly instead of
having to use the functionX syntax as follows:
array('function1' => array($class, 'method')))

PHPBB3-13370
[ticket/13427] Add several before/after template events to mcp_front.html.

PHPBB3-13427
[ticket/13302] Update documentation and support forum links to 3.1 versions.

PHPBB3-13302
[ticket/13302] Update translations forum link to 3.1.

PHPBB3-13302