[tutorial 013] A variable with type "choice"

"Foo" should not be an option to the "proxy_mode" variable.

Now the "proxy_mode" type is "choice", that means that there is a list of available values that can be selected.

We say that the "proxy_mode" variable is constrained (by choices): this variable accept, in fact, only a list of choices.

firefox/00-proxy.yml

@@ -1,4 +1,11 @@
 ---
 proxy_mode:
   description: Configure Proxy Access to the Internet
+  type: choice
+  choices:
+    - No proxy
+    - Auto-detect proxy settings for this network
+    - Use system proxy settings
+    - Manual proxy configuration
+    - Automatic proxy configuration URL
   default: No proxy