Bugfix: require("../foo")

If you have a circular require chain in which one or more of the modules are
referenced with a ".." relative path, like require("../foo"), node blows up.
This patch un-blows-up that case.  There still seem to be issues with
circularity, but this solves one of the more obnoxious ones.

src/node.js

@@ -667,13 +667,17 @@ var posix = posixModule.exports;
 
 var pathModule = createInternalModule("path", function (exports) {
   exports.join = function () {
-    var joined = "";
+    var joined = "", 
+      dotre = /^\.\//g,
+      dotreplace = "",
+      dotdotre = /(^|(\/)([^\/]+\/)?)\.\.\//g,
+      dotdotreplace = ""
     for (var i = 0; i < arguments.length; i++) {
       var part = arguments[i].toString();
 
       /* Some logic to shorten paths */
       if (part === ".") continue;
-      while (/^\.\//.exec(part)) part = part.replace(/^\.\//, "");
+      while (dotre.exec(part)) part.replace(dotre, dotreplace);
 
       if (i === 0) {
         part = part.replace(/\/*$/, "/");
@@ -684,7 +688,10 @@ var pathModule = createInternalModule("path", function (exports) {
       }
       joined += part;
     }
+    // replace /foo/../bar/baz with /bar/baz
+    while (dotdotre.exec(joined)) joined.replace(dotdotre, dotdotreplace);
     return joined;
+    
   };
 
   exports.dirname = function (path) {
@@ -840,6 +847,8 @@ Module.prototype.loadObject = function (filename, loadPromise) {
 function cat (id, loadPromise) {
   var promise;
   
+  debug(id);
+
   if (id.match(/^http:\/\//)) {
     promise = new process.Promise();
     loadModule('http', process.mainModule)