make clearer that the new cursors are non-w3c

Author: m4rch3n1ng

src/lib.rs

@@ -254,14 +254,20 @@ pub enum CursorIcon {
     ZoomOut,
 
     /// Indicates that the user will select the action that will be carried out.
+    ///
+    /// This is a non-standard extension of the w3c, that will only be emitted
+    /// when used with a wayland backend.
     DndAsk,
 
     /// Indicates that something can be moved or resized in any direction.
+    ///
+    /// This is a non-standard extension of the w3c, that will only be emitted
+    /// when used with a wayland backend.
     AllResize,
 }
 
 impl CursorIcon {
-    /// The name of the cursor icon as defined in w3c standard.
+    /// The name of the cursor icon as defined in the w3c standard or wayland spec.
     ///
     /// This name most of the time could be passed as is to cursor loading
     /// libraries on X11/Wayland and could be used as-is on web.