Merge branch '6.0-to-7.0' into 'master'

Create 6.0-to-7.0 update guide

doc/update/6.0-to-6.8.md → doc/update/6.0-to-7.0.md

-# From 6.0 to 6.8
-
-**In 6.1 we remove a lot of deprecated code.**
-
-**You should update to 6.0 before installing 6.1 or higher so all the necessary conversions are run.**
+# From 6.0 to 7.0
 ## Deprecations
+The 'Wall' feature has been removed in GitLab 7.0. Existing wall comments will remain stored in the database after the upgrade.
+
 ## Global issue numbers
 As of 6.1 issue numbers are project specific. This means all issues are renumbered and get a new number in their URL. If you use an old issue number URL and the issue number does not exist yet you are redirected to the new one. This conversion does not trigger if the old number already exists for this project, this is unlikely but will happen with old issues and large projects.
@@ -34,7 +32,7 @@ sudo -u git -H git fetch --all
 For GitLab Community Edition:
 ```bash
-sudo -u git -H git checkout 6-8-stable
+sudo -u git -H git checkout 7-0-stable
 ```
 OR
@@ -42,7 +40,7 @@ OR
 For GitLab Enterprise Edition:
 ```bash
-sudo -u git -H git checkout 6-8-stable-ee
+sudo -u git -H git checkout 7-0-stable-ee
 ```
@@ -91,12 +89,12 @@ sudo chmod u+rwx,g+rx,o-rwx /home/git/gitlab-satellites
 TIP: to see what changed in gitlab.yml.example in this release use next command: 
 ```
-git diff 6-0-stable:config/gitlab.yml.example 6-8-stable:config/gitlab.yml.example
+git diff 6-0-stable:config/gitlab.yml.example 7-0-stable:config/gitlab.yml.example
 ```
-* Make `/home/git/gitlab/config/gitlab.yml` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/6-8-stable/config/gitlab.yml.example but with your settings.
-* Make `/home/git/gitlab/config/unicorn.rb` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/6-8-stable/config/unicorn.rb.example but with your settings.
-* Make `/etc/nginx/sites-available/nginx` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/6-8-stable/lib/support/nginx/gitlab but with your settings.
+* Make `/home/git/gitlab/config/gitlab.yml` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/7-0-stable/config/gitlab.yml.example but with your settings.
+* Make `/home/git/gitlab/config/unicorn.rb` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/7-0-stable/config/unicorn.rb.example but with your settings.
+* Make `/etc/nginx/sites-available/nginx` the same as https://gitlab.com/gitlab-org/gitlab-ce/blob/7-0-stable/lib/support/nginx/gitlab but with your settings.
 * Copy rack attack middleware config
 ```bash