add softlayer installation instructions

Docker-DCO-1.1-Signed-off-by: Andrea Turli <andrea.turli@gmail.com> (github: andreaturli)
address comments from @jamtur01

Docker-DCO-1.1-Signed-off-by: Andrea Turli <andrea.turli@gmail.com> (github: andreaturli)
Update ubuntulinux.rst

Adding the Docker repository key fails if port 11371 not open. This would probably work for more people.
Using names in docker ps --since-id/--before-id, resolves #3565

Also renames --since-id/--before-id to --since/--before and add errors
on non-existent containers.
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)
Add upstart nofile/noproc similar to systemd init
Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
Merge pull request #4740 from vojnovski/patch-1

Update ubuntulinux.rst
Merge pull request #4749 from cpuguy83/add_nofile_noproc_settings_to_upstart

Add upstart nofile/noproc similar to systemd init
Merge pull request #4744 from LK4D4/fix_issue_#3565

Using names in docker ps --since-id/--before-id, resolves #3565
Add image size to history docs

Fixes #3147
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #4755 from crosbymichael/add-size-to-history-docs

Add image size to history docs
cleanup container.stop

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
Add sudo clause if your using osx or tcp
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #4757 from crosbymichael/osx-duh

Add sudo clause if your using osx or tcp
Be explicit about binding to all interfaces in redis example

Fixes #4021

Moved to debian because the redis installed in ubuntu is really old
and does not support args via the cli.
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #4753 from vieux/clean_container_stop

cleanup container.stop
Merge pull request #4758 from crosbymichael/redis-bind

Be explicit about binding to all interfaces in redis example
Merge pull request #4727 from andreaturli/master

add softlayer installation instructions
refactor($hack,$docs): be consistent in apt-key keyserver URI usage, as done in #4740

In #4740, the apt-key call in docs is changed to use the keyserver port 80 instead of
port 11371, as the previous call would fail with a restrictive firewall or proxy.
This commit extends the change to all apt-key calls in the repository.

Docker-DCO-1.1-Signed-off-by: Viktor Vojnovski <vojnovski@gmail.com> (github: vojnovski)
Merge pull request #4754 from vojnovski/consistent_apt-key_use

refactor($hack,$docs): be consistent in apt-key keyserver URI usage