Skip "no chain" error on deleting chain in Unmap

Fixes #6904
Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Truncate the names list on ps

Signed-off-by: Robert Bittle <guywithnose@gmail.com>
Merge pull request #7686 from guywithnose/trancateNames

Truncate the names list on ps
Revert "--help option and help command should print to stdout not stderr"

This reverts commit 61b129d81802e3c988cc0e67e488b24968dd748a.

Signed-off-by: Victor Vieux <vieux@docker.com>
Merge pull request #7764 from vieux/revert

Revert "--help option and help command should print to stdout not stderr"
Merge pull request #7762 from LK4D4/skip_delete_no_chain_#6904

Skip "no chain" error on deleting chain in Unmap
Update /etc/hosts when linked container is restarted

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
pkg/graphdb: tests for Parents and Children

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
pkg/networkfs/etchosts: tests for Update method

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Update networking doc with clarified text regarding links usage

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
daemon: linkmanager and namemanager, first attempts at abstracting the graphDB

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
daemon, links/manager: move linkmanager and namemanager into links/manager

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)