Add process for PR acceptance, review, rejection

This is an extremely tentative PR.  However, I feel that the suggestions are generally good.

Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: timthelion)
Fix contrib/mkimage/debootstrap for Lucid

Later versions of `apt` are smart enough to just create this directory if it's missing, but Lucid balks (just like `gnupg` and `gpgv` aren't in the Required set so don't come in a minbase -- good ol' Lucid).

Signed-off-by: Andrew Page <admwiggin@gmail.com>
Merge pull request #7359 from timthelion/patch-10

Add process for PR acceptance, review, rejection
fix #7374 leftover

Signed-off-by: Victor Vieux <vieux@docker.com>
Merge pull request #7549 from vieux/fix_leftover

fix #7374 leftover
fix goroutines leak and exit code

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

Signed-off-by: Victor Vieux <vieux@docker.com>
Merge pull request #7301 from vieux/fix_goroutines_leak_exit_code

fix goroutines leak and exit code
Merge pull request #7545 from tianon/mkimage-lucid-fix

Fix contrib/mkimage/debootstrap for Lucid
Save "META" field in Dockerfile into image content.

This will allow a user to save META data into an image, which
can later be retrieved using:

docker inspect IMAGEID

I have copied this from the "Comment" handling in docker images.

We want to be able to add json data to an image to describe the image, and
then be able to use other tools to look at this data, to be able to do
security checks based on this data.

We are thinking about adding version names, Perhaps listing the content of the dockerfile.
Descriptions of where the code came from etc.

One option is to call this flag Meta, another would be to call it Vendor.

Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
Allow encoding of dockerfile into docker inspect

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