Apple's PFE for GCC is now available

[Neil Booth]

> Finally, if you're wondering how this relates to the PCH branch, it's
> being actively discussed.  PFE has both pluses and minuses relative to
> the current PCH work, and ideally we'll be able to use both in coming
> up with superior precompiled header support for FSF GCC.

Where is it being actively discussed?  It's a shame this stuff isn't
out in the open; I'd like to know what the plans are as I have (had)
ideas of my own.

Neil.