deny net host + dns and links with container net

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Update debian.md

Add some instructions for Debian 7 (aka Wheezy/Stable)

Signed-off-by: Vishal Doshi <vishal.doshi@gmail.com>
Try to go for 80-char lines and a little md wrangling.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Merge pull request #7819 from SvenDowideit/debian-wheezy-notes

Debian wheezy notes - minor md tweaks
Refactoring execdriver.Command and Container structs to support 'docker exec' and other
similar features in the future.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Rename 'StdConfig' to 'StreamConfig'.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Merge pull request #7829 from crosbymichael/process-config

Refactor exec drivers for multi process
Update libcontainer to 55430d0db7c6bb1198c0bb573a9

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Update mount struct with reference

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Merge pull request #7780 from unclejack/disallow_dns_with_net_host

disallow net=host and net=container with links and dns
Merge pull request #7830 from crosbymichael/update-libcontainer-sep1

Update libcontainer to version 55430d0db7c6bb1198c0bb573a9700a859d5ec26
Make nat test less racy and accurate

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Merge pull request #7832 from crosbymichael/fix-nat-test

Make nat test less racy and accurate
Add more error info to TestDockerRunEchoStdoutWithMemoryLimit

This test fails on my CI server often so we need more info when it does
happen with this test.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Merge pull request #7833 from crosbymichael/mem-test

Add more error info to TestDockerRunEchoStdoutWithMemoryLimit