Refactored the interface of the io package

examples/server/server.q

@@ -6,30 +6,30 @@ main() {
 	socket := sys.socket(2, 1, 0)
 
 	if socket < 0 {
-		io.error("socket error\n")
+		io.write("socket error\n")
 		sys.exit(1)
 	}
 
 	if net.bind(socket, 8080) != 0 {
-		io.error("bind error\n")
+		io.write("bind error\n")
 		sys.exit(1)
 	}
 
 	if sys.listen(socket, 128) != 0 {
-		io.error("listen error\n")
+		io.write("listen error\n")
 		sys.exit(1)
 	}
 
-	io.out("listening...\n")
+	io.write("listening...\n")
 
 	loop {
 		conn := sys.accept(socket, 0, 0)
 
 		if conn >= 0 {
-			io.write(conn, "HTTP/1.0 200 OK\r\nContent-Length: 6\r\n\r\nHello\n")
+			io.writeTo(conn, "HTTP/1.0 200 OK\r\nContent-Length: 6\r\n\r\nHello\n")
 			sys.close(conn)
 		} else {
-			io.error("accept error\n")
+			io.write("accept error\n")
 		}
 	}
 }