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)
archive: add unclejack to MAINTAINERS

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
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?
apache2 was looking for two other directories

/var/lock/apache2
/var/run/apache2
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
updated article to reflect changes in config; fixed hyperlinks #7243

Docker-DCO-1.1-Signed-off-by: Andrew Weiss <andrew.weiss@outlook.com> (github: anweiss)
Merge pull request #7166 from unclejack/maintainer_archive

archive: add unclejack to MAINTAINERS
address a few nits

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
Merge pull request #7244 from anweiss/7243-dscarticle

Updated DSC article to reflect changes in config
Fix io.Reader ambiguity on EOF in progressreader

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
Merge pull request #7238 from dericcrago/patch-1

apache2 was looking for two other directories
Merge pull request #7251 from tiborvass/fix-test-import-display

Fix test import display
Allow setting of environment variables when importing docker images

We want to be able to set the container=docker environment
variable when we build RHEL docker images.  I believe there
will be other use cases where you might want to set
environment in base images.

Since you can do this in layered image, I see no reason not
to allow it in base images.

Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)