Standardize API keys: CamelCase

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

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Fix for setuid race condition in LXC driver

This is a fix for a race condition in the LXC driver.  This is described
more in issue #6092.

Closes #6092

Docker-DCO-1.1-Signed-off-by: Shane Canon <scanon@lbl.gov> (github: scanon)
pkg: mflag: flag: make mflag strip quotes in -flag="var" forms

This patch improves the mflag package to ensure that things arguments
to mflag such as `-flag="var"` or `-flag='var'` have the quotes
stripped from the value (to mirror the getopt functionality for similar
flags).

Docker-DCO-1.1-Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> (github: cyphar)
pkg: mflag: flag: added tests for quote-stripped flags

This patch adds some tests to ensure that quoted flags are properly
handled by the mflag package.

Docker-DCO-1.1-Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> (github: cyphar)
Adding "stats" and "spec" option to nsinit binary which will print the stats and spec respectively.

Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Remove unused and racy "used" param from streamformatter

Also tests written
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
aws json is not javascript style json. trailing comma breaks it :(

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6116 from vishh/nsinit_stats

Adding "stats" and "spec" option to nsinit CLI
Update cpu stat test for no error
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #6150 from LK4D4/remove_used_from_streamformatter

Remove unused and racy "used" param from streamformatter
Merge pull request #6130 from vieux/standardize_api_keys

Standardize api keys to CamelCase
Merge pull request #6147 from cyphar/6142-mflag-strip-quotes-long-equal-form

mflag: strip quotes in certain forms from flag values
Merge pull request #6160 from crosbymichael/update-test-for-nil-error

Update cpu stat test for no error
Merge pull request #6138 from NERSC/6092-setuidrace

Fix for setuid race condition in LXC driver
Merge pull request #6159 from SvenDowideit/s3-json-fixup

aws json is not javascript style json. trailing comma breaks it :(
Changed all references from Trusted Builds to Automated Builds

* Updated docker images output
* Updated docker images -t/--trusted option to -a/--automated
* Changed *trusted variables to *automated
* Changed is_trusted to is_automated
* Updated man pages, docs and completion
* Updated API documentation

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: jamtur01)