playbook: Prompt for SlapOS master URLs

Defaults are kept, as in settings/vifib.yml

playbook/slapos.yml

@@ -6,6 +6,16 @@
     - settings/vifib.yml
 
   vars_prompt:
+    - name: "slapos_master_url"
+      prompt: "What is the url to the SlapOS Master API?  (ignore if you already have a configured re6st and slapos):"
+      private: no
+      default: "https://slap.vifib.com/"
+
+    - name: "slapos_web_master_url"
+      prompt: "What is the url to the SlapOS Master Website?  (ignore if you already have a configured re6st and slapos):"
+      private: no
+      default: "https://slapos.vifib.com/"
+
     - name: "computer_name"
       prompt: "What is this computer name?  (ignore if you already have a configured re6st and slapos):"
       private: no