[Flow] Flow 2.2 development version - authentication issues

[Steffen Wickham]

Hello guys,

for a completly new project I'm using the current master branch of Flow,
so it would be based on 2.2 on it's release date in some months. But
currently I'm running in some troubles regarding authentication and
really hope you can help me. :-)

As it worked for me on 2.1, the same authentication controller stopped
working for 2.2. I tried to find the reason why this happens and found
that the securityContext doesn't return any AuthenticationToken to the
AuthenticationManager even the internalarguments of the request deliver
the credentials in a proper way. I posted all related files to
https://gist.github.com/BlackIPS/9185580dbf335153d9ff, please have a
look (I just removed the real vendor and package name due restrictions).

Does anyone else have the same issue?
We are running Flow on nginx with php-fpm 5.4 setup.

Greetings
Steffen