[ticket/13041] Reordering "Login and Registration Issues"

PHPBB3-13041
[ticket/13041] Updating "User Preferences and settings"

PHPBB3-13041
[ticket/13041] Updating "Login and Registration Issues"

PHPBB3-13041
[ticket/13041] Updating "Posting Issues"

PHPBB3-13041
[ticket/13041] Updating "Searching the Forums"

PHPBB3-13041
[ticket/13041] Updating "phpBB3 Issues"

PHPBB3-13041
[ticket/13041] Updating "Topic Subscriptions and Bookmarks"

PHPBB3-13041
[ticket/13041] Added multiple changes

- "phpBB3" replaced by "phpBB"
- Added the changes suggested by VSE.
- "Subscriptions and Bookmarks" reviewed
- Added trailing comma on modified lines

PHPBB3-13041
[ticket/13164] Update post_visibility before event is triggered

PHPBB3-13164
[ticket/13041] Added multiple changes

- Added the changes reported by VSE.

PHPBB3-13041
[ticket/13164] Add post_visibility to core.submit_post_end event

PHPBB3-13164
[ticket/13164] Fix syntax error

PHPBB3-13164
[ticket/13126] Improve the feedback when running the migrations

PHPBB3-13126
[ticket/13126] Extends migrator_output_handler instead of using a closure

PHPBB3-13126
[ticket/13138] Do not use cookie data and autologin while forcing a user_id

PHPBB3-13138
Merge branch 'ticket/13138-2' into ticket/13138-asc

Conflicts:
	phpBB/phpbb/session.php
[ticket/12568] Replace modifications explanation with extensions.

PHPBB3-12568
[ticket/12568] Update path to language pack installation page.

PHPBB3-12568
[ticket/12568] Update style installation instructions.

PHPBB3-12568
[ticket/12568] Remove various unnecessary references to phpBB3.

PHPBB3-12568