Use the global read() now that it's available in background threads.

exec/dorkit/jsexec_input.js

@@ -3,29 +3,18 @@ js.load_path_list.unshift(system.exec_dir+"/dorkit/");
 load('ansi_input.js');
 var q = new Queue("dorkit_input");
 var k;
-var f;
-if(system.platform == 'Win32') {
-	f = new File('CON');
-	if(!f.open('rb', false, 0))
-		throw("Unable to open CON device!");
-}
-else {
-	f = new File('/dev/stdin');
-	if(!f.open('rb', false, 0))
-		throw("Unable to open /dev/stdin!");
-}
 
 while(!js.terminated) {
 	if (parent_queue.poll(0))
 		break;
 	// Can't select() files on Win32.
 	if(system.platform == 'Win32') {
-		k = f.read(1);
+		k = read(1);
 	}
 	else {
 		k = undefined;
-		if (socket_select([f.descriptor], 0.1).length == 1)
-			k = f.read(1);
+		if (socket_select([0], 0.1).length == 1)
+			k = read(1);
 	}
 	if (k != undefined && k.length)
 		ai.add(k);