Dev fix: Set the legacy.ajax option to null by default so you can tell

DataTables to specifially send the SSP params in the old or new format

.datatables-commit-sync

@@ -1 +1 @@
-bfbc4166e80a47cee283757c2f4516ade09778cd
+75b9c2a7f105519aa810cf28e65d23bdd494ced9

media/js/jquery.dataTables.js

@@ -2442,8 +2442,17 @@
 		}
 	
 		data.__legacy = true;
-		return settings.sAjaxSource || DataTable.ext.legacy.ajax ?
-			data : d;
+	
+		// If the legacy.ajax parameter is null, then we automatically decide which
+		// form to use, based on sAjaxSource
+		var legacy = DataTable.ext.legacy.ajax;
+		if ( legacy === null ) {
+			return settings.sAjaxSource ? data : d;
+		}
+	
+		// Otherwise, if legacy has been specified then we use that to decide on the
+		// form
+		return legacy ? data : d;
 	}
 	
 	
@@ -13067,9 +13076,9 @@
 			 * requests
 			 *
 			 *  @type boolean
-			 *  @default false
+			 *  @default null
 			 */
-			ajax: false
+			ajax: null
 		},