[v3] --enable-debug

[Benjamin Kosnik]

>I apologize for doing nothing.  I've been, ehh, distracted.  Anyhow.

Eh, no apology needed.

>Thanks for doing this.

Yep. Needed to be done. Hopefully this makes it less mystical for some people.

I put up some additional debug information here (or will be here soon):
http://gcc.gnu.org/onlinedocs/libstdc++/debug.html

It's preliminary, but has most of the crucial bits.

-benjamin