Optionalize the "hg clone" of Go, since it takes forever (now, to update our Go version too, we need to explicitly "./hack/vendor.sh --go")

Signed-off-by: Andrew Page <admwiggin@gmail.com>
Fix typo for --restart deprecation

Signed-off-by: Chris Armstrong <chris@opdemand.com>
Removed deprecated release notes

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