[tutorial v1.1_241] Redefine it to password is mandatory if an username is set

foxyproxy/10-redefine.yml

@@ -0,0 +1,17 @@
+%YAML 1.2
+---
+version: 1.1
+
+proxies:
+
+  username:
+    redefine: true
+    mandatory: false
+
+  password:
+    redefine: true
+    hidden:
+      variable: _.username
+      when: null
+      description: if username is empty
+...