Add a test for mount.GetMounts

Because mount.parseInfoFile is only available on Linux

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
FreeBSD's nullfs doesn't support file mount

FreeBSD doesn't have "bind" mount, but nullfs might be a similar feature.
However nullfs can mount only directories.

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Support FreeBSD on pkg/mount

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Update fedora.md

Docker-DCO-1.1-Signed-off-by: Alexander Shopov <ash@kambanaria.org> (github: alshopov)

Squashed by

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)

replaces #6478

Docker-DCO-1.1-Signed-off-by: Alexander Shopov <ash@kambanaria.org> (github: )
Update dockervolumes.md

Missed double hyphen in `--volumes-from` option
Remove old tag format

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Fix header and about Docker links
Fix typo in the docs.

Fix a minor typographical error inside `run.md`.
Merge pull request #6617 from ifraixedes/patch-1

Update dockervolumes.md
Merge pull request #6599 from SvenDowideit/6478-update-fedora

Update fedora.md
Merge pull request #6620 from vieux/deprecate_tag_args

Remove old tag format
Merge pull request #4812 from kzys/freebsd-mount

FreeBSD support on pkg/mount
Merge pull request #6623 from rogaha/fix_header_links

Fix header and About Docker links
Merge pull request #6624 from jezenielzapanta/patch-1

Fix typo in the docs.
Add Sockets (-H) list to `docker -D info`.

This will allow us to _know_ what the user's -H settings are, which may
be useful for debugging later.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
move api docs to APIv1.13

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Lets not download the gravatar and then download a different one after the js is triggered

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6633 from SvenDowideit/avoid-extra-gravatar-download

Lets not download the gravatar and then download a different one after t...
Migrate TestGetEvents into a unit and a CLI test

Docker-DCO-1.1-Signed-off-by: Guilherme Salgado <gsalgado@gmail.com> (github: gsalgado)
Move truncindex in separate package in pkg/

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)