Fix bug that caused test-remote-module-loading.js
to use the installed version of the http library
rather than the build one.

ab seems to have to problem resolving 'localhost' on Urban's computer.

There is a small problem with test-remote-module-loading.js.
When it starts a child "node", the child uses the default require.paths
instead unshifting the build lib/

Something is broken in how keep-alive is working. Reverting until I can fix
it.

This reverts commit b893859c.

Just raise exception naturally.

API change summary:

  * require("/sys.js") becomes require("sys")

  * require("circle.js") becomes require("./circle")

  * process.path.join() becomes require("path").join()

http://groups.google.com/group/nodejs/browse_thread/thread/1034fd2ad2cd93e8