Add AUDIT_WRITE cap

Fixes #6345

Thanks @larsks for outstanding investigation

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Fix incorrect path in ENTRYPOINT example

The ENTRYPOINT example uses "/usr/bin/ls" as path, but `ls` is located at `/bin/ls`.

Docker-DCO-1.1-Signed-off-by: Sebastiaan van Stijn <github@gone.nl> (github: thaJeztah)
Properly handle 0 being passed as a signal

Docker-DCO-1.1-Signed-off-by: Matt Heon <mheon@redhat.com> (github: mheon)
Merge pull request #7179 from LK4D4/add_cap_audit_write_#6345

Add AUDIT_WRITE cap
Merge pull request #7212 from mheon/kill_zero

Properly handle 0 being passed as a signal number
update go import path and libcontainer

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
gofmt -s -w

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
revert AUTHORS changes

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
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)
Merge pull request #7225 from vieux/update_path

update go import path and libcontainer
allow sigquit to display stacktrace in debug mode

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #7185 from thaJeztah/patch-1

Fix incorrect path in ENTRYPOINT example
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