Re: pgbench - add \if support

>> A new automaton state is added to quickly step over false branches.
>
> This one took me a little while to understand while reading the patch,
> but mostly because of how diff doesn't handle moving things around.

"git diff -w --patience" may help.

> Marking as ready for committer.

Here is a rebase. I made some tests use actual expressions instead of just 
0 and 1. No other changes.

-- 
Fabien.