Merge pull request #7632 from erikh/fix_check_config

fix check-config.sh to check for CGROUP_PERF
Update usingdocker.md

Minor rewording and removal of unnecessary apostrophe.
Merge pull request #7684 from averagehuman/patch-1

Update usingdocker.md
Fix typo for --restart deprecation

Signed-off-by: Chris Armstrong <chris@opdemand.com>
Initial commit: Increase Boot2Docker Volume + images

Signed-off-by: Hollie Teal <hollie@docker.com>
Additional formatting and markdown changes to B2D volume resize doc

Signed-off-by: Hollie Teal <hollie@docker.com>
Removed deprecated release notes

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: jamtur01)
Handle error from GetDevice early

Also more verbose error.

Fixes panic from #7701

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Added manual installation instruction for Centos7.
Added a note about firewalld.

Signed-off-by: Nicolas Goy <kuon@goyman.com>
Merge pull request #7700 from jamtur01/relnotes

Removed deprecated release notes
fix return values in registry mock service

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Merge pull request #7725 from erikh/fix_registry_test

fix return values in registry mock service
Merge pull request #7691 from carmstrong/patch-1

Fix typo for --restart deprecation
Skip permissions check on named pipes

Fixes #7680

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Merge pull request #7683 from LK4D4/fix_build_hang_pipe_#7680

Skip permissions check on named pipes
Merge pull request #7649 from tianon/vendor-optional-go

Optionalize the "hg clone" of Go, since it takes forever
Merge pull request #7659 from somaopensource/soma

 daemon: rename from "delete" job to "rm"
Fix panic in validate context for build

Fixes #7611

Signed-off-by: Michael Crosby <michael@docker.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>