Update flag usages and docs for max restart count

Signed-off-by: Michael Crosby <michael@docker.com>
Added Test case for Engine shutdown

Docker-DCO-1.1-Signed-off-by: Rajdeep Dua <dua_rajdeep@yahoo.com> (github: rajdeepd)
Fix logs -f hanging on stopped containers

Fixes #7020

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Test for following logs for stopped container

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Add link to Ubuntu notes about LTSEnablementStack

When running Ubuntu with a graphical environment, the kernel version MUST match the Xorg version. Only installing the suggested packages above breaks Unity for anything other than 2D mode (in VMware and probably native).
Signed-off-by: Ethan Spoelstra <ewspoelstra@computerphreaks.com>
Added manual installation instruction for Centos7.
Added a note about firewalld.

Signed-off-by: Nicolas Goy <kuon@goyman.com>
Fix the bug of docker import command when import a image with a tag use format 'URL|- [REPOSITORY[:TAG]]'.Fixes #7714

Signed-off-by: Lei Jitang <leijitang@huawei.com>
add docker import test with a tag. Fixes #7714

Signed-off-by: Lei Jitang <leijitang@huawei.com>
Merge pull request #7716 from coolljt0725/master

Fix the bug of docker import command when import a image with a tag use format 'URL|- [REPOSITORY[:TAG]]'
Merge pull request #7629 from LK4D4/fix_follow_hang_on_stop

Fix logs -f hanging on stopped containers
Merge pull request #7622 from rajdeepd/master

Added Test case for Engine shutdown
Merge pull request #7574 from crosbymichael/update-restart-docs

Update flag usages and docs for max restart count
Merge pull request #7603 from kuon/centos7

Added manual installation instruction for Centos7 and note about firewalld.
small word change

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #7732 from SvenDowideit/ubuntu-backported-kernel

Ubuntu backported kernel
Add Oracle Linux specific documentation for installation of Docker from Oracle Linux repositories on Oracle Linux 6 and 7.

Signed-off-by: Avi Miller <avi.miller@oracle.com>