[PATCH 4 of 4 py3] config: mark parser regexes as bytes explicitly

[Yuya Nishihara]

On Wed, 09 Nov 2016 11:23:41 -0500, Augie Fackler wrote:
> # HG changeset patch
> # User Augie Fackler <augie at google.com>
> # Date 1476019539 14400
> #      Sun Oct 09 09:25:39 2016 -0400
> # Node ID 6eca307a01fe1331f8a754d532f89e9c488c3923
> # Parent  5f29fffcc722d8993fda4155884c1aae4469d2f3
> config: mark parser regexes as bytes explicitly

Queued 2 and 4, thanks.