[ticket/12791] String profile fields do not use links ...

smilies and line breaks in memberlist

The value is overwritten with the contact value
Added aditional check if the field is a contact so we don't overwrite it.

PHPBB3-12791
[ticket/12791] Changed the if check

Removed unneeded variable

PHPBB3-12791
[ticket/12793] String '0' does not display for string profile fields

See https://github.com/phpbb/phpbb/pull/2647#discussion_r14503051

PHPBB3-12793
[ticket/12793] Changing get_profile_contact_value to get_profile_value_raw

Changing the return to get_profile_value_raw

PHPBB3-12793
[ticket/12793] Tests (added and changed)

changed behavieur of 0 as in and added 0 as string test

PHPBB3-12793
[ticket/12883] Do not use basename() to get the search class in tidy_search

PHPBB3-12883
[ticket/12884] Add core event to the function upload_attachment()

Add core event to the function upload_attachment()
in functions_posting.php to provide ability for extensions
to perform additional actions on uploaded files, like resizing etc.

PHPBB3-12884
[ticket/12656] Use lang keys for CLI command descriptions

PHPBB3-12656
[ticket/12656] Use lang keys for all CLI strings

PHPBB3-12656
[ticket/12883] Remove pointless comments

PHPBB3-12883
[ticket/12656] Use utf8 ’ instead of escaping '

PHPBB3-12656
[ticket/12656] Fix typo

PHPBB3-12656
[ticket/12656] Fix syntax in language file

PHPBB3-12656
[ticket/12881] Checks earlier if server-side topic marking is enabled

PHPBB3-12881
[ticket/12891] Replace template loops with 1 loop to reduce generation time

PHPBB3-12891
[ticket/12892] Do not set S_NUM_ROWS when adding a row to a template loop

We do not set S_NUM_ROWS while adding a row, to reduce the complexity
If we would set it on adding, each subsequent adding would cause
n modifications, resulting in a O(n!) complexity, rather then O(n)

PHPBB3-12892
Merge pull request #2779 from nickvergessen/ticket/12892

[ticket/12892] Do not set S_NUM_ROWS when adding a row to a template loop

* nickvergessen/ticket/12892:
  [ticket/12892] Do not set S_NUM_ROWS when adding a row to a template loop
[ticket/12870] Create the migrations table in db:migrate

PHPBB3-12870
[ticket/12870] Add $config['version'] in phpbb_extension_manager_test

PHPBB3-12870
Merge pull request #2777 from Nicofuma/ticket/12881

[ticket/12881] Debug error - Undefined index: mark_time

* Nicofuma/ticket/12881:
  [ticket/12881] Checks earlier if server-side topic marking is enabled