Merge branch 'omniauth-doc-fix' into 'master'

Add missing "omniauth" prefix to option in docs

This MR is specifically a fix for #3319. I wanted to make my first contribution to GitLab, so I picked a simple one!

This changes the omniauth documentation for the `block_auto_created_users` option to `omniauth_block_auto_created_users`.

Thanks

---

closes #3319 

See merge request !1734

CHANGELOG

@@ -25,6 +25,7 @@ v 8.2.0 (unreleased)
   - Fix: 500 error returned if destroy request without HTTP referer (Kazuki Shimizu)
   - Remove deprecated CI events from project settings page
   - [API] Add ability to fetch the commit ID of the last commit that actually touched a file
+  - Fix omniauth documentation setting for omnibus configuration (Jon Cairns)
   - Add "New file" link to dropdown on project page
   - Include commit logs in project search
   - Add "added", "modified" and "removed" properties to commit object in webhook

doc/integration/omniauth.md

@@ -36,7 +36,7 @@ If you want to change these settings:
     ```
     gitlab_rails['omniauth_enabled'] = true
     gitlab_rails['omniauth_allow_single_sign_on'] = false
-    gitlab_rails['block_auto_created_users'] = true
+    gitlab_rails['omniauth_block_auto_created_users'] = true
     ```
 
 * **For installations from source**