closing client sockets timeout on attempts,

[technocake]

The client threads should really close the sockets after a timeout, so that blocking clients wont hang.

Problem: If a client speaking to the server is blocking, the NerdHandler will hang to. All the way until the client closes the connection.
The control of the socket should be on the server side, not the challenge side.

Solution:
A) Implement a timeout for each NerdHandler, and kill the NerdHandler after f.ex: 2s

For killing a thread, see:
http://mail.python.org/pipermail/tutor/2001-June/006702.html