TYPO3.Flow

I'm using FLOW3 in a subdomain environment and need a way to have valid session cookies for all subdomains of a php session. It's easy to implement by adding some parameters in the start method of PHPSession.php

    $cookieParameters['lifetime'],
                $cookieParameters['path'],
                $cookieParameters['domain'],
                $cookieParameters['secure'],
                $cookieParameters['httponly']
            );

The cookie params could be set by adding the following yaml options.

TYPO3:
  FLOW3:
    session:
      PHPSession:
        cookie:
        lifetime: 3600
        path:     '/'
        domain:   '.domain.com'
        secure:   false
        httponly: false