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>
Signed-off-by: David Gebler <davidgebler@gmail.com>

	modified:   userguide/dockerlinks.md
    fixes incorrect environment variable labeling in container linking guide
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 #8008 from dwgebler/master

fixes incorrect environment variable labeling in container linking guide
HTTP Status 201 not 200

The http status should be 201 not 200.

Docker-DCO-1.1-Signed-off-by: Erik Kristensen <erik@erikkristensen.com> (github: SvenDowideit)
Merge pull request #8028 from SvenDowideit/ekristen-patch-1

HTTP Status 201 not 200
Merge pull request #8010 from LK4D4/fix_ps_s_hang_#7999

Fix ps -s hang
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
Change the copy command Content-Type header to x-tar
Addresses #6107

Signed-off-by: Srini Brahmaroutu <srbrahma@us.ibm.com>
Merge pull request #8020 from erikh/rewrite_hosts_files

Links v2: Mutable network files
Merge pull request #8044 from brahmaroutu/container_copy_6107

Change the copy command Content-Type header to x-tar
Merge pull request #8005 from SvenDowideit/document-sshd-env-vars

Document how to pass ENV vars to the user's shell
Merge pull request #8023 from nerab/patch-1

Append instead of replace file contents