integcli: add some more docker utils

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
integcli: use dockerCmdInDir in build tests

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Print about "copy volume content" test passing

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Add contrib/nuke-graph-directory.sh script to clean out old /var/lib/docker directories much more easily

Signed-off-by: Andrew Page <admwiggin@gmail.com>
Add maintainers to daemon/ and graph/

Signed-off-by: Solomon Hykes <solomon@docker.com>
Container name lookups to prefer IDs over names

Lookups of container names should prefer the ID over
names assigned to containers by users.

Signed-off-by: Eric Windisch <eric@windisch.us>
Cleanup: extract bindmount spec parsing

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
Replace "amd64" build tags with "cgo" as appropriate, and remove where unnecessary

Signed-off-by: Andrew Page <admwiggin@gmail.com>
utils/broadcastwriter -> pkg/broadcastwriter

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
utils.Debugf -> log.Printf, move jsonlog to own package.

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
port usage of jsonlog to the new daemon files which were refactored
recently.

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

Added link to community guidelines
Use pure go markdown processor to generate man files

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
Only import "testing" from *_test.go

This prevents the testing package flags from leaking into the flagsets
of binaries that import docker. I left integration-cli alone.

Docker-DCO-1.1-Signed-off-by: Peter Bourgon <peter@bourgon.org> (github: peterbourgon)
Run hack/generate-authors.sh

Docker-DCO-1.1-Signed-off-by: Peter Waller <p@pwaller.net> (github: pwaller)
Change Peter Waller's canonical e-mail address

Docker-DCO-1.1-Signed-off-by: Peter Waller <p@pwaller.net> (github: pwaller)
Add a few canonicalized author names

Docker-DCO-1.1-Signed-off-by: Peter Waller <p@pwaller.net> (github: pwaller)
Regenerate AUTHORS one more time

Signed-off-by: Andrew Page <admwiggin@gmail.com>
Graphtest is ok to compile normally

The graphtest package is only imported in the test files of other
packages therefore we do not leak testing flags.

Signed-off-by: Michael Crosby <michael@docker.com>
Revert `rm -f` deprecation use SIGKILL instead

`rm -f` was originally deprecated in favor of `rm --stop/--kill` since `rm
-f` was sending SIGTERM and potentially very slow.
Instead this will bring back `rm -f` but use SIGKILL isntead

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)