Commit report for master branch

[Arran Cudbard-Bell]

> 
> Odd. I have to say I can't really see a need for expansions in check items,
> and if they don't work today, maybe it's still reasonable to say that regexp
> values could be precompiled.

They worked (last time I checked) fine in unlang conditions. They should work 
ubiquitously once everything uses the same tokenizer.

We could of course conditionally compile expressions that had no expanded 
children, it would be fairly easy to do.

-Arran