implement sharing articles by unique url

prefs.js

@@ -1590,6 +1590,24 @@ function clearFeedAccessKeys() {
 	return false;
 }
 
+function clearArticleAccessKeys() {
+
+	var ok = confirm(__("This will invalidate all previously shared article URLs. Continue?"));
+
+	if (ok) {
+		notify_progress("Clearing URLs...");
+
+		var query = "?op=rpc&subop=clearArticleKeys";
+
+		new Ajax.Request("backend.php", {
+			parameters: query,
+			onComplete: function(transport) {
+				notify_info("Shared URLs cleared.");
+			} });
+	}
+
+	return false;
+}
 function resetFeedOrder() {
 	try {
 		notify_progress("Loading, please wait...");