Add new script to generate AUTHORS and regenerate AUTHORS (fixing a few new dups too)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
allow sigquit to display stacktrace in debug mode

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Typo in dockervolumes.md line 141?
Merge pull request #7234 from michielbdejong/patch-1

Typo in dockervolumes.md line 141?
Merge pull request #7227 from tianon/generate-authors

Add new script to generate AUTHORS and regenerate AUTHORS (fixing a few new dups too)
Merge pull request #7231 from vieux/allow_stack_trace

allow sigquit to display stacktrace in debug mode
Add Daemon test utils

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
Add TestRunningContainersOnDaemonRestart

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)