Removing ansi2knr support

[Jeff Bailey]

I'd like to propose that we consider removing ansi2knr from mailutils. 
The GNU coding standards now permit the use of ANSI C, and I suspect
that ansi2knr is never getting testing or used.  It's worth noting that
there was a similar discussion on the GCC list, and the only places that
they're keeping KNR support is in code that gets used to build a
bootstrap compiler for HPUX.  I think it's probably reasonable to ask HP
folks to download GCC.

Also, what do folks think about using new constructs from C99?

-- 
When you get to the heart,
use a knife and fork.
 - Instructions for eating an artichoke.