Update libcontainer to 53eca435e63db58b06cf796d3a9

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Note that using -lxc-conf to change things Docker manages has pitfalls

Signed-off-by: Sven Dowideit <SvenDowideit@docker.com>

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
I was talking to someone whom i listen to, and she noted that our docs don't mention the license

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
Merge pull request #9528 from SvenDowideit/add-license-to-docs

Add Apache license and link to the docs
Merge pull request #9493 from SvenDowideit/note-lxc-conf-pitfall

Note that using -lxc-conf to change things Docker manages has pitfalls
Merge pull request #9488 from crosbymichael/update-libcontainer-dec3

Update libcontainer to 53eca435e63db58b06cf796d3a9