Update usingdocker.md

Minor rewording and removal of unnecessary apostrophe.
(cherry picked from commit fe845c4da88ef15baf45fa600a077a75f3634c40)

Docker-DCO-1.1-Signed-off-by: averagehuman <averagehuman@users.noreply.github.com> (github: SvenDowideit)
Removed deprecated release notes

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

(cherry picked from commit df38eb4d43b03728253593622fe4285e99d0784f)

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: SvenDowideit)
Update flag usages and docs for max restart count

Signed-off-by: Michael Crosby <michael@docker.com>
(cherry picked from commit 5ad4879d2a5ee5af95c8b8ab701a621c8b49609a)

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@docker.com> (github: SvenDowideit)
Added manual installation instruction for Centos7.
Added a note about firewalld.

Signed-off-by: Nicolas Goy <kuon@goyman.com>
(cherry picked from commit d4a53a7bce0205ba0cb693b43091b78f6ce8702a)

Docker-DCO-1.1-Signed-off-by: Nicolas Goy <kuon@goyman.com> (github: SvenDowideit)
Add link to Ubuntu notes about LTSEnablementStack

When running Ubuntu with a graphical environment, the kernel version MUST match the Xorg version. Only installing the suggested packages above breaks Unity for anything other than 2D mode (in VMware and probably native).
Signed-off-by: Ethan Spoelstra <ewspoelstra@computerphreaks.com>

(cherry picked from commit 27f44b9bb162dce988913b981f1f21eb149d875f)

Docker-DCO-1.1-Signed-off-by: dragon788 <dragon788@users.noreply.github.com> (github: SvenDowideit)
small word change

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

(cherry picked from commit 93d574298da0f420c19db52b75ebf31ed3cb2ec9)
Add Oracle Linux specific documentation for installation of Docker from Oracle Linux repositories on Oracle Linux 6 and 7.

Signed-off-by: Avi Miller <avi.miller@oracle.com>
(cherry picked from commit fcad8ee83a2cf9192ba4f9ec7d5c1d0b03a6aa47)

Docker-DCO-1.1-Signed-off-by: Avi Miller <avi.miller@oracle.com> (github: SvenDowideit)
Updating LxcConf to match Docker command line

I've changed LxcConf on a previous API document. Not sure why it keeps getting changed back. I'm seeing Docker 1.2.0 command-line calls are still using the array of key/values.

Docker-DCO-1.1-Signed-off-by: getvictor <victor@victoreda.com> (github: SvenDowideit)

(cherry picked from commit 216ab880f96125566f2816510ba9d396dcf103f0)
Fix the other API docs to use an array of key/values

as per #7706

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

(cherry picked from commit b0edced87f2a9bd2e85b0a59f6a6c83aff36e445)
Merge pull request #7753 from docker/post-1.2.0-docs-update-1

Post 1.2.0 docs update 1