Clean up comment sections and fix typos in CmdRun

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
DOCKER_VERSION and docker-version havn't been implemented.

So far, it looks like the declarations are not used, and so its safer not to
confuse people into thinking they do something.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Fixes #8690

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)
Merge pull request #8692 from jfrazelle/8690-latest-tag-problem

Fix problem where building Dockerfile `FROM name:latest`
Merge pull request #8672 from estesp/CmdRun-fix-typos-comments

Clean up comment sections and fix typos in CmdRun
Correct url from github.com/dotcloud/docker{,-py}
to github.com/docker/docker{,-py}

Signed-off-by: Torstein Husebø <torstein@huseboe.net>
TestRunRedirectStdout kept failing with timed out.

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)
Merge pull request #8708 from torstehu/fix-url

Correct url from github.com/dotcloud/docker{,-py}
Merge pull request #8673 from SvenDowideit/whats-docker-version

DOCKER_VERSION and docker-version havn't been implemented.
Merge pull request #8718 from jfrazelle/run-redirect-test-fix

TestRunRedirectStdout kept failing with timed out.