use tune2fs to disable ext4 mount counts and mount intervals
Signed-off-by: Marc Tamsky <mtamsky@gmail.com> (github: tamsky)
Document how to pass ENV vars to the user's shell

As this is a somewhat common question.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Use defined variable

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Use unlocked version of changes for GetImage

Fixes #7999

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Test for docker ps -s

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Allow /etc/hosts and /etc/resolv.conf to be updated both outside and
inside the container.

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Append instead of replace file contents

I think the `DOCKER_OPTS` should be appended to `/etc/default/docker` and not replace the entire contents.
Merge pull request #8010 from LK4D4/fix_ps_s_hang_#7999

Fix ps -s hang
The default name of the bridge created is called 'docker0'.
docs: shrink images

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
docs: change kernel version requirement

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Merge pull request #7698 from tamsky/tune2fs_base_filesystem

use tune2fs to disable ext4 mount counts and mount intervals
clean up the context when a build fails

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Merge pull request #8038 from unclejack/failed_build_context_cleanup

clean up the context when a build fails
Adding Exec method to native execdriver.
Modified Attach() method to support docker exec.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Adding support for docker exec in daemon.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Adding 'exec' command to remote API and CLI.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Import nsenter in docker.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Fix bug in attach handling for docker exec. Add docs for 'docker exec' feature.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Update cli.md to include 'docker exec' feature.
Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)