include/stdio.h

[Florian Weimer]

* Jonny Grant:

> May I check, I'd not expected /usr/include/stdio.h to state this, is it to state stdio is built on top of C++ iostreams nowadays?
>
> In the repo it is /glibc/libio/stdio.h
>
> "Define ISO C stdio on top of C++ iostreams"

Internally, it's still built this way.  But the C++ meant here is the
C++ ABI implemented by GCC 2.95, so that aspect is now entirely useless.
We should probably remove that C++ reference from the public header.

Thanks,
Florian