And fix missing var!

It would be good to get this script running at the end of every test, so we
know that modules aren't leaking either - but it will require a lot
modification of the tests so that they themselves aren't leaking globals.

Found by Cliffano Subagio
http://groups.google.com/group/nodejs/browse_thread/thread/f46f093938265ac0/387e14da08c7dd7b?

- Handle only the most basic of query string parsing and construction.
  Leave the rest (e.g. Rails/PHP behaviors) to modules higher up the
  stack, like Express.

- fix AttributeError on "use_openssl" when doing ./configure --without-ssl - error was: AttributeError: Values instance has no attribute 'use_openssl'

Expose the SHA1 digest of the certificate as the fingerprint attribute in
the object returned by getPeerCertificate()

Add a setUp and tearDown function to the test case class, and use it to
create and remove the test/tmp directory for each test.

TODO: amend other tests.

Implement SlowBuffer.prototype.slice in js