Signed-off-by: Joas Schilling <coding@schilljs.com>

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

Signed-off-by: Joas Schilling <coding@schilljs.com>

Signed-off-by: Joas Schilling <coding@schilljs.com>

Signed-off-by: Joas Schilling <coding@schilljs.com>

Signed-off-by: Joas Schilling <coding@schilljs.com>

Otherwise `null` is returned which leads to a ton of similar error messages if the log condition setting is enabled.:

```
{"reqId":"3wVBarnDfOV3qkI1bVCU","remoteAddr":"89.98.78.41","app":"PHP","message":"hash_equals(): Expected user_string to be a string, null given at \/var\/www\/html\/lib\/private\/Log.php#275","level":3,"time":"2016-10-07T14:22:15+00:00","method":"PROPFIND","url":"\/remote.php\/webdav\/","user":"icewind"}
```

Downstreaming of https://github.com/owncloud/core/pull/26213



Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

- Updated the config sample to point to log_type='file'
- Renamed the Class for logfile logging to File in namespace 'OC\Log\'.
  Changed the occurrences of 'OC\Log\Owncloud' to 'OC\Log\File'.
- Renamed the Class for log:file command to File in namespace 'OC\Core\Command\Log\File'.
  Changed registration of the command to use 'OC\Core\Command\Log\File'.
- Changed default Syslog tag to Nextcloud
- Retained backwards compatibility for configs with 'logtype' => 'owncloud'

- Adjusted tests for the new file log.

Closes #490.

* Make the filtering better readable

* Add some more methods to the sensitive list

* \OC\DateTimeFormatter
* \OC\DateTimeZone
* \OC\ForbiddenException
* \OC\HTTPHelper
* \OC\HintException
* \OC\LargeFileHelper
* \OC\Log
* \OC\NaturalSort
* \OC\NavigationManager
* \OC\NeedsUpdateException
* \OC\NotSquareException

With PHP7 Throwable is the new base interface for all Exception and Error - we should be capable to log Throwable as well

Fixes https://github.com/owncloud/core/issues/23717

* fixed #16318
* create logException in ILogger
* add unit tests

 * Log condition for log level increase based on conditions. Once one of these
   conditions is met, the required log level is set to debug. This allows to
   debug specific requests, users or apps

 * Supported conditions (setting `log_condition` in `config.php`):
    - `shared_secret`: if a request parameter with the name `log_secret` is set to
                this value the condition is met
    - `users`:  if the current request is done by one of the specified users,
                this condition is met
    - `apps`:   if the log message is invoked by one of the specified apps,
                this condition is met
 * fix unit test and add app log condition test

* remove duplicate code from child classes

This reverts commit 6a1a4880.

This is a first draft. It has only been tested with the ownlcloud logger.
Some internal fields are JSON encoded several times which makes it harder to read.

Most of the normalizer is borrowed from Monolog
https://github.com/Seldaek/monolog/blob/master/src/Monolog/Formatter/NormalizerFormatter.php