Fixes #6311: cp the init.d file locally instead of remote

doc/update/5.4-to-6.0.md

@@ -94,7 +94,7 @@ Note: We switched from Puma in GitLab 5.4 to unicorn in GitLab 6.0.
 ```bash
 sudo rm /etc/init.d/gitlab
-sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/6-0-stable/lib/support/init.d/gitlab
+sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 sudo chmod +x /etc/init.d/gitlab
 ```

doc/update/6.0-to-6.1.md

@@ -71,7 +71,7 @@ sudo -u git -H bundle exec rake cache:clear RAILS_ENV=production
 ```bash
 sudo rm /etc/init.d/gitlab
-sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/6-1-stable/lib/support/init.d/gitlab
+sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 sudo chmod +x /etc/init.d/gitlab
 ```

doc/update/6.1-to-6.2.md

@@ -87,7 +87,7 @@ sudo cp lib/support/logrotate/gitlab /etc/logrotate.d/gitlab
 ```bash
 sudo rm /etc/init.d/gitlab
-sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/6-2-stable/lib/support/init.d/gitlab
+sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 sudo chmod +x /etc/init.d/gitlab
 ```