PassengerUseGlobalQueue is now the default and throws a warning.
Current Passenger is in the 4.0.x series.
RackAutodetect is no longer in Passenger and throws an error.
PassengerAppRoot is required to launch the Passenger loader.
Added more version-flexible Directory directives for forward compatibility as well as specifically-described ErrorLog and CustomLog.
Passenger: Give more context about special directories and config.ru

- Explain PassengerAppRoot
- Link to where to find config.ru if you don't have a complete copy of the
  Puppet source (#23358)
Merge branch 'passenger-updates'