Hey folks!
I lately tried to get Drupal working with PHP-PM and thought about a little adjust that is absolutely required to get even basic functionality working. That functionality is basically that the HttpKernel/DrupalKernel allows a second request (more than one call against `DrupalKernel::handle`) without crashing.
Currently in the handle method calls always a method called `initializeSettings`, which is only necessary once. This patch basically makes sure, that method is only called once.
This gets the basic php-pm approach alive with Drupal. However, some common things currently don't work perfectly like session handling and css file name generation. I guess it's worth to merge this in, so other people don't stumble over the same when trying to get Drupal working with php-pm. :)
Cheers
Marc