Replace 5-1-stable with 5-2-stable in installation docs

doc/install/installation.md

@@ -137,10 +137,10 @@ To setup the MySQL/PostgreSQL database and dependencies please see [`doc/install
     cd /home/git/gitlab
 
     # Checkout to stable release
-    sudo -u git -H git checkout 5-1-stable
+    sudo -u git -H git checkout 5-2-stable
 
 **Note:**
-You can change `5-1-stable` to `master` if you want the *bleeding edge* version, but
+You can change `5-2-stable` to `master` if you want the *bleeding edge* version, but
 do so with caution!
 
 ## Configure it
@@ -216,7 +216,7 @@ Make sure to update username/password in config/database.yml.
 
 Download the init script (will be /etc/init.d/gitlab):
 
-    sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/master/lib/support/init.d/gitlab
+    sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/5-2-stable/lib/support/init.d/gitlab
     sudo chmod +x /etc/init.d/gitlab
 
 Make GitLab start on boot:
@@ -257,7 +257,7 @@ If you can't or don't want to use Nginx as your web server, have a look at the
 
 Download an example site config:
 
-    sudo curl --output /etc/nginx/sites-available/gitlab https://raw.github.com/gitlabhq/gitlabhq/master/lib/support/nginx/gitlab
+    sudo curl --output /etc/nginx/sites-available/gitlab https://raw.github.com/gitlabhq/gitlabhq/5-2-stable/lib/support/nginx/gitlab
     sudo ln -s /etc/nginx/sites-available/gitlab /etc/nginx/sites-enabled/gitlab
 
 Make sure to edit the config file to match your setup:
@@ -326,10 +326,10 @@ GitLab uses [Omniauth](http://www.omniauth.org/) for authentication and already
 
 These steps are fairly general and you will need to figure out the exact details from the Omniauth provider's documentation.
 
-* Add `gem "omniauth-your-auth-provider"` to the [Gemfile](https://github.com/gitlabhq/gitlabhq/blob/master/Gemfile#L18)
+* Add `gem "omniauth-your-auth-provider"` to the [Gemfile](https://github.com/gitlabhq/gitlabhq/blob/5-2-stable/Gemfile#L18)
 * Run `sudo -u git -H bundle install` to install the new gem(s)
-* Add provider specific configuration options to your `config/gitlab.yml` (you can use the [auth providers section of the example config](https://github.com/gitlabhq/gitlabhq/blob/master/config/gitlab.yml.example#L53) as a reference)
-* Add icons for the new provider into the [vendor/assets/images/authbuttons](https://github.com/gitlabhq/gitlabhq/tree/master/vendor/assets/images/authbuttons) directory (you can find some more popular ones over at https://github.com/intridea/authbuttons)
+* Add provider specific configuration options to your `config/gitlab.yml` (you can use the [auth providers section of the example config](https://github.com/gitlabhq/gitlabhq/blob/5-2-stable/config/gitlab.yml.example#L53) as a reference)
+* Add icons for the new provider into the [vendor/assets/images/authbuttons](https://github.com/gitlabhq/gitlabhq/tree/5-2-stable/vendor/assets/images/authbuttons) directory (you can find some more popular ones over at https://github.com/intridea/authbuttons)
 * Restart GitLab
 
 ### Examples