This will make sure that we will not encounter a non-existing auth provider.
We will revert to the default db auth provider if the one set in the config
does not exist in our auth provider collection.
PHPBB3-12352
[ticket/12589] Search directly in $directory if it's an absolute sub-path
* Nicofuma/ticket/12589:
[ticket/12589] Add test searching in a non absolute directory
[ticket/12589] Fix tests
[ticket/12589] Search directly in $directory if it's an absolute sub-path
[ticket/12637] Correct file header in coding-guidelines
* bantu/ticket/12637:
[ticket/12637] Fixup all incorrect uses of file header.
[ticket/12637] Correctly escape the file header in coding-guidelines.html.
[ticket/10899] Using Delete All in log viewer with keyword search
* Nicofuma/ticket/10899:
[ticket/10899] Update doc block
[ticket/10899] Use isset($field_value['IN'])
[ticket/10899] Add event core.delete_log
[ticket/10899] Remove trailing ;
[ticket/10899] Fix typo in the class name
[ticket/10899] Add unit tests
[ticket/10899] Get $phpbb_log from the container
[ticket/10899] Remove extra ';'
[ticket/10899] Typo
[ticket/10899] Refactoring in \phpbb\log\log_interface
[ticket/10899] Using Delete All in log viewer with keyword search
[ticket/11467] Add language variables for extension exception messages
* n-aleha/ticket/11467:
[ticket/11467] Add user object to extension manager for tests
[ticket/11467] Add language variables to tests
[ticket/11467] Add language variables for extension exception messages
[ticket/12597] Command for executing all available cron tasks
* ptitlazy/ticket/12597: (27 commits)
[ticket/12597] Reformating an acp message
[ticket/12597] Modifiying acp message
[ticket/12597] Fix wrong global variable name
[ticket/12597] Typo correction
[ticket/12597] Typo corrections
[ticket/12597] Changing place of lock release in execute() method
[ticket/12597] Fix test file
[ticket/12597] Typing corrections and improvement of code consistency
[ticket/12597] Fix various mistakes
[ticket/12597] Fix various mistakes
[ticket/12597] Fix visibilty of two functions in run.php
[ticket/12597] Refactoring and test improving
[ticket/12597] Fix language key name
[ticket/12597] Fix coding style and typing mistakes
[ticket/12597] Changes name of command cron:run-all to cron:run.
[ticket/12597] Fix various problems
[ticket/12597] Fix constructor bug and servral doc blocs
[ticket/12597] Modification of return statuses and of test files
[ticket/12597] Fix misplaced release of db lock
[ticket/12597] Change EXECUTE to RUN in language
...
[ticket/11226] filespec::move_file() should error correctly
* Nicofuma/ticket/11226:
[ticket/11226] Explicity set file_moved to false
[ticket/11226] Add tests
[ticket/11226] Use $user->lang()
[ticket/11226] filespec::move_file() should error correctly
[ticket/12561] Add "after" check to schema_generator for columns_add
* PayBas/ticket/12561:
[ticket/12561] Reworked tests by nickvergessen
[ticket/12561] Added tests for "after last", "after missing" and "empty"
[ticket/12561] Add check to see if "after" column actually exists
[ticket/12561] Added test for "after"
[ticket/12561] Add "after" check to schema_generator for columns_add
[ticket/12174] Update topic_attachment flag when a post is soft-deleted
* Nicofuma/ticket/12174:
[ticket/12174] Add tests
[ticket/12174] Coding style
[ticket/12174] Remove $update_topic_attachments_flag
[ticket/12174] Don't update the flag for a post without attachment
[ticket/12174] Update the conditions
[ticket/12174] Remove inline assignment
[ticket/12174] Update sql query
[ticket/12174] Revert the changes on $topic_update_array
[ticket/12174] Corrections
[ticket/12174] Update topic_attachment flag when a post is soft-deleted
Actually fix the return status of command cron:run-all
Fix some doc block coding style issue
Fix missing and obsolete file headers
Delete a useless constructor method
PHPBB3-12597
[ticket/12536] Get Versions Should Not Require Both Stable and Unstable
* Nicofuma/ticket/12536:
[ticket/12536] Restore missing @throws
[ticket/12536] Add test cases with empty versions list
[ticket/12536] Use stable values when unstable are unavailable
[ticket/12536] Update doc block
[ticket/12536] Return empty array if stability unavailable
[ticket/12536] Get Versions Should Not Require Both Stable and Unstable
