Ak 4.2.2 official mainline update network stack to 2011-10-21 state from Kernel git.

In my continuous effort for compatibility: our network stack code is mostly updated to 2011-10-21: 

The last commit I did:
- tcp: add const qualifiers where possible
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf533ea53ebfae41be15b103d78e7ebec30b9969

I just need to reach 2012-05-03 to import Early Retransmit ;-)

I just hope I can do it before they change the whole code base.... well, that could actually be helpful. :) I'll keep up with the good fight.

I'll document COMMIT-UPDATES.txt later tonight or tomorrow.