Update for node 1.16 api changes

hello_world.js

@@ -1,4 +1,4 @@
-var server = require('http_server.js');
+var server = require('./http_server')
 
 function hello(req, res, match) {
   res.simpleHtml(200, "Hello " + (match || "World") + "!");

http_server.js

@@ -1,5 +1,5 @@
-node.mixin(require('/utils.js'));
-var http = require('/http.js');
+process.mixin(require('sys'));
+var http = require('http')
 
 var NOT_FOUND = "Not Found\n";
 
@@ -194,7 +194,7 @@ exports.staticHandler = function (req, res, filename) {
       return;
     }
 
-    node.fs.cat(filename, encoding).addCallback(function (data) {
+    process.fs.cat(filename, encoding).addCallback(function (data) {
       body = data;
       headers = [ [ "Content-Type"   , content_type ],
                   [ "Content-Length" , body.length ]

memresourced.js

@@ -1,4 +1,4 @@
-var server = require('http_server.js');
+var server = require('./http_server')
 
 var people = [
 	{ name: "Bob", age: 47, programmer: false },
@@ -7,7 +7,7 @@ var people = [
 ];
 
 function on_change(id) {
-	node.debug(id, JSON.stringify(people[id]));
+	process.debug(id, JSON.stringify(people[id]));
 }
 
 server.resource("people", server.resourceController("people", people), on_change);

todos_backend.js

@@ -4,9 +4,9 @@
 // This provides the same REST style api as the merb example and even hosts
 // on port 4000. It's a drop in replacement for the sample merb backend.
 
-include('/file.js');
+include('/file');
 
-var server = require('http_server.js');
+var server = require('./http_server')
 
 var tasks;
 
@@ -49,7 +49,7 @@ function save_data() {
 // Load the data from the disk
 function load_data(callback) {
 	// Load the database from disk
-	var promise = node.fs.cat("tasks.db", "utf8");
+	var promise = process.fs.cat("tasks.db", "utf8");
 	promise.addCallback(function (json) {
 		tasks = JSON.parse(json);
 		callback(true);