Skipping empty lines in .dockerignore

Docker-DCO-1.1-Signed-off-by: Ian Babrou <ibobrik@gmail.com> (github: bobrik)
Set state running before dumping to disk

Fixes #4766
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
missing doc for 6896

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
re-write to put the emphasis on the  format

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6991 from bobrik/empty-dockerignore

Skipping empty lines in .dockerignore
Merge pull request #6954 from LK4D4/fix_container_run_after_restart_#4766

Set state running before dumping to disk
Merge pull request #7045 from SvenDowideit/pr_out_re_write_to_put_the_emphasis_on_the_format

re-write to put the emphasis on the  format
Save "COMMENT" field in Dockerfile into image content.

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

docker inspect IMAGEID

Copied the test example and some description data from Erik Hollensbe
<github@hollensbe.org>

Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
Add support to allow docker import to populate Comment field

This patch adds an option to docker import -m  Which will allow
base image builder to populate docker images with more comments then
just imported from FOOBAR.  This matches the docker commit -m functionality.

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