v1.13 and 1.14 api docs now match runconfig/config.go
more updates

Signed-off-by: Victor Vieux <vieux@docker.com>
Dockerfile documentation typo and content fix

Signed-off-by: Oh Jinkyun <tintypemolly@gmail.com>
registry/session: fix panic in GetRemoteImageLayer

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
fix typos in error messages

Signed-off-by: Ward Vandewege <ward@jhvc.com> (github: cure)
Merge pull request #7865 from cure/master

fix typos in error messages
fix race in daemon test framework

Signed-off-by: Tibor Vass <teabee89@gmail.com>
handle empty envvars for DOCKER_GRAPHDRIVER and DOCKER_EXECDRIVER in daemon test framework

Signed-off-by: Tibor Vass <teabee89@gmail.com>
Merge pull request #7875 from tiborvass/fix-integration-panic

Fix panic in integration-cli
small typo. fixed broken code snippet

Docker-DCO-1.1-Signed-off-by: Nathan Hsieh <hsieh.nathan@gmail.com> (github: nhsiehgit)
Merge pull request #7864 from unclejack/fix_panic_registry_session

registry/session: fix panic in GetRemoteImageLayer
Merge pull request #7858 from somaopensource/typo-fix

Dockerfile documentation typo and content fix
Merge pull request #7828 from vieux/update_api_docs

Remote api docs for POST /containers/create were out of sync with runconfig/config.go
Merge pull request #7876 from nhsiehgit/typofix

small typo. wrapping cut code snippet
Update SSH demo to ubuntu 14.04

Signed-off-by: Jan Keromnes <janx@linux.com>