Restore logged in status after recreation of container

[n00b12345]

Right now once a container is destroyed and created again, the logged in status is lost and one has to log in afresh.

I backup my volumes daily (after stopping the container) and therefore this is a bit of an annoyance.

Remembering the state of logged in users would really be great. Kindly consider it as a feature if possible.

[bayang]

At the moment the session is stored in memory because I didn't wanted to bother with that. So each container restart means a new session. I'll see if storing the session in the BDD is not too much work.