Change sigTTOU/TTIN to IGNORE by default

[Volker Stolz]

In local.glasgow-haskell-bugs, you wrote:
>I guess it's another one of those dark corners that Volker seems to
>wonder into with alarming regularity :)

Hey, you guys want real-world haskell applications, so you get them :)
Which reminds me of a yet untackled sigCHLD problem which shows up
only on Solaris and not Linux nor FreeBSD. But since I'm still trying to
finish my project in the next few days, I guess it just has to wait. So
don't think I'm finished with ghc and signal handling yet #-) 

Additionally, this experience shows that although being FP hackers
everyone still has a firm grasp on reali^WPOSIX.
-- 
\usepackage[latin1]{inputenc}!
Volker Stolz * stolz at i2.informatik.rwth-aachen.de * PGP + S/MIME