Bug#722898: wording change and wrap up

[Thiemo Nagel <thiemo.nagel@gmail.com>]

> I just committed and uploaded everything.

Thank you very much.

> Sorry for the delay.

Not to worry!

I think that it would be very nice to include the speed improvements
into one of the next point releases (after they have received some
coverage in testing). To minimize the risk for breakage while still
getting the largest part of the speed increase, I'd suggest to
backport just these two patches:

* Set blocksize to 512k
* Allocate buffer from heap instead of stack

(Actually, the heap-instead-of-stack patch isn't even necessary, if it
can be guaranteed that the stack size is larger than ~600k on all
supported architectures.)

Cheers,
Thiemo