[Ping][Patch] Speedup Riemann Zeta

[Florian Goth]

Hi all,
in my attempt to get to know the handling within this list and 
how patches are dealt within gcc,
I posted a while ago this patch here

https://gcc.gnu.org/ml/libstdc++/2014-08/msg00033.html


Anything wrong with it?
I would like to learn which guidelines I have to respect,
before I try to get the larger patches for the Polylog function into libstdc++.

Thanks for your time,
Florian.