url: revert reslove urls with . and ..

This reverts commit ad0684807c.

Initially, this bug fix targeted master, and I pushed to have it
included in v0.10. In retrospect, I'm not sure it should have made into
v0.10 as it seems it could break a lot of existing working code.

In my opinion, this change is still a bug fix, and it is not backward
incompatible per se. However, I'm not sure that taking the risk to break
a lot of users with a new 0.10.x release that would include this fix is
reasonable, especially now that 0.10.x releases are entering
maintenance mode.

PR-URL: https://github.com/joyent/node/pull/9257
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/url.js

@@ -600,8 +600,8 @@ Url.prototype.resolveObject = function(relative) {
   // then it must NOT get a trailing slash.
   var last = srcPath.slice(-1)[0];
   var hasTrailingSlash = (
-      (result.host || relative.host || srcPath.length > 1) &&
-      (last === '.' || last === '..') || last === '');
+      (result.host || relative.host) && (last === '.' || last === '..') ||
+      last === '');
 
   // strip single dots, resolve double dots to parent dir
   // if the path tries to go above the root, `up` ends up > 0

test/simple/test-url.js

@@ -1087,14 +1087,6 @@ var relativeTests = [
   ['/foo/bar/baz/', 'quux/baz', '/foo/bar/baz/quux/baz'],
   ['/foo/bar/baz', '../../../../../../../../quux/baz', '/quux/baz'],
   ['/foo/bar/baz', '../../../../../../../quux/baz', '/quux/baz'],
-  ['/foo', '.', '/'],
-  ['/foo', '..', '/'],
-  ['/foo/', '.', '/foo/'],
-  ['/foo/', '..', '/'],
-  ['/foo/bar', '.', '/foo/'],
-  ['/foo/bar', '..', '/'],
-  ['/foo/bar/', '.', '/foo/bar/'],
-  ['/foo/bar/', '..', '/foo/'],
   ['foo/bar', '../../../baz', '../../baz'],
   ['foo/bar/', '../../../baz', '../baz'],
   ['http://example.com/b//c//d;p?q#blarg', 'https:#hash2', 'https:///#hash2'],