[users] Improve documentation of setRootPassword

src/modules/users/users.conf

@@ -45,8 +45,11 @@ doAutologin:     true
 # potentially confusing users.
 sudoersGroup:    wheel
 
-# Setting this to false , causes the root account to be disabled.
+# Setting this to false, causes the root account to be disabled.
+# When disabled, hides the "Use the same password for administrator"
+# checkbox. Also hides the "Choose a password" and associated text-inputs.
 setRootPassword: true
+
 # You can control the initial state for the 'reuse password for root'
 # checkbox here. Possible values are:
 #  - true to check or