patches for threads/eh, tuning, etc

[Benjamin Kosnik]

Cool. I'm almost done with some of the GNATS triage, but I too am leaving 
soon for critical mass and other non-work stuff. 

Next up for me is libstdc++/2346, and then I'd like to work with you on 
the solaris fseek issue when this threads/eh bit is done. Sound good?

best,
benjamin

> Yes, I can.  However, I will not even have the respin done before I
> have to leave.  This is my number one priority on Tuesday.
>