kernel: update to 3.10.40.
kernel: add pie packet sheduler.
Merge remote-tracking branch 'arne_f/kernel-test'
Revert "sshd: add fallback for oom setings with old kernel."

This reverts commit 1566fb6b5531247bd60d291716da1d5a017e9dce.
xen kernel was dropped and in the code are missing brackets.