Correct a dir name in test documentation.
Tear the RewriteRule stuff out of the sample Apache config. Refs bug 834509.

It doesn't save much time: about 20ms per request on a VM, even at 20 concurrent connections. It should be even less on a burly production box.

This makes setup more understandable for new users, and it means we no longer have two branches in our code to test—everybody goes through browse() now.