Merge pull request #927 from mattermost/lfbrock-patch-1

Added when to use https vs http to GitLab SSO instructions

doc/integrations/Single-Sign-On/Gitlab.md

@@ -7,6 +7,8 @@ The following steps can be used to configure Mattermost to use GitLab as a singl
   * `<your-mattermost-url>/login/gitlab/complete` (example: http://localhost:8065/login/gitlab/complete)
   * `<your-mattermost-url>/signup/gitlab/complete`
   
+  (Note: If your GitLab instance is set up to use SSL, your URIs must begin with https://. Otherwise, use http://).
+
 3. Submit the application and copy the given _Id_ and _Secret_ into the appropriate _SSOSettings_ fields in config/config.json
 
 4. Also in config/config.json, set _Allow_ to `true` for the _gitlab_ section, leave _Scope_ blank and use the following for the endpoints: