[ticket/10776] Fixed errors in docs/README.html.

PHPBB3-10776
[ticket/10776] Fixed a couple language changes in docs/README.html.

PHPBB3-10776
[ticket/10050] adding .topicrow to template condition

PHPBB3-10050
[ticket/10050] removing prosilver edits

PHPBB3-10050
[ticket/11343] Use === when checking stored user_actkey against user input.

Use strict comparison when checking whether stored user_actkey is equal to user
input.

PHPBB3-11343
[ticket/11343] Remove spare space.

PHPBB3-11343
[ticket/11343] Remove spare parentheses.

PHPBB3-11343
Merge PR #1219 branch 'bantu/ticket/11343' into develop-olympus

# By Andreas Fischer
# Via Andreas Fischer
* bantu/ticket/11343:
  [ticket/11343] Remove spare parentheses.
  [ticket/11343] Remove spare space.
  [ticket/11343] Use === when checking stored user_actkey against user input.
[ticket/11233] prohibit selecting anonymous user as a PM recipient

While composing pm, it should not be allowed to add
anonymous user as a PM recipient

PHPBB3-11233
Merge remote-tracking branch 'remotes/Senky/ticket/10050' into develop-olympus

# By Senky
# Via Senky
* remotes/Senky/ticket/10050:
  [ticket/10050] removing prosilver edits
  [ticket/10050] adding .topicrow to template condition
Merge remote-tracking branch 'dhruvgoel92/ticket/11233' into develop-olympus

* dhruvgoel92/ticket/11233:
  [ticket/11233] prohibit selecting anonymous user as a PM recipient
[ticket/11220] Improvement to the info pop-up from "list="

A improvement to the info popup which is displayed when the cursor
is over the bbcode-button [list=] in the posting-editor

PHPBB3-11220
Merge remote-tracking branch 'Crizz0/ticket/11220' into develop-olympus

* Crizz0/ticket/11220:
  [ticket/11220] Improvement to the info pop-up from "list="
[ticket/10896] Adds email validation to email settings in ACP

Adds a new validation type to the ACP validate_config_vars function
and implements it on the board_contact and board_email settings.

PHPBB3-10896
[ticket/10896] Move EMAIL_INVALID_EMAIL to common, replace EMAIL_INVALID

PHPBB3-10896
[ticket/11196] Changed 401 response message in session.php.

In session.php 401 response message was "Not Authorized".
I changed it to "Unauthorized".

PHPBB3-11196
Merge branch 'ticket/erangamapa/11196' into develop-olympus

* ticket/erangamapa/11196:
  [ticket/11196] Changed 401 response message in session.php.
[ticket/11361] Make sure that array passed to strtr() has the proper format.

The array $date_cache[$format]['lang'] passed to strtr() contains a sub-array
which results in an E_NOTICE being thrown for 'Array to string conversion' on
PHP 5.4.
Ensure that the array passed to strtr() is one-dimensional by filtering out
non-string values.

PHPBB3-11361
[ticket/11122] Add EXreaction to docs/AUTHORS.

PHPBB3-11122
[ticket/11122] Move rxu to 'Former Contributors' section.

PHPBB3-11122