[PATCH v2] riched20: Add more warnings for unhandled control words.

[Huw Davies]

On Thu, Sep 14, 2017 at 01:03:11AM -0500, Zebediah Figura wrote:
> v2: use FIXME instead of WARN; use debugstr_a (thanks Huw)

Unfortunately, these generate a lot of noise (especially in the tests).
We probably want to deal with things like \rtf and \uc before this
goes in.

Huw.