Remove blank "use" documentation

Introduced in dotcloud/docker#3070

Docker-DCO-1.1-Signed-off-by: Ben Firshman <ben@firshman.co.uk> (github: bfirsh)
Update dockerlinks.md

Added missing command for logging into web container.
Merge pull request #7114 from bfirsh/remove-blank-use-doc

Remove blank "use" documentation
Merge pull request #7117 from hipertracker/patch-1

Update dockerlinks.md
Fix minor grammar issues in dockervolumes.md
Merge pull request #7131 from msabramo/patch-1

Fix minor grammar issues in dockervolumes.md
Docker should use /var/lib/container/tmp for large temporary files.

/tmp is often a tmpfs file system and large temporary files could cause
docker commands to fail.  Also using /tmp potentially allows users on the
system to get access to content, or even attack the content.  Moving the tmpdir to
/var/lib/container/tmp will protect the data.

Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)