v3 of regexp search for mid/folder/path

[David Bremner]

David Bremner <david at tethera.net> writes:

> No sooner posted than I realized it had a bug: the previous version
> compared against the prefixed term so anchored searches failed.
>
> I've also included some tests for the new features in this version.
>
> Below is an interdiff against v1

Gauteh reported success with these patches on IRC. Anyone want more time
to review?

d