[jcifs] Ewww, deadlock in b2

[Allen, Michael B (RSCH)]

There's a good o'l fashion deadlock in b2 so don't do anything real with it. I know why it's deadlocking. Not sure how I'm going to fix it though.

I also found an embarrising bug that's been around since day one. Apparently for every request/response pair of messages an Object was being left over. This could make the client sluggish and heavy
over long periods of time (or not so long if your doing intense work). Oh well, the leak's been plugged so think of it as another "performance improvement" :~)

Mike