machines.

libcurl *printf and by Linux printf(). This should make the code work nicely
even for 64bit size_ts.

limit-rate. It does work on the expense of the rate limiter.

just to avoid making a totally empty file. Just to avoid compiler warnings.

officially using library-code when building the app (at least for the platforms
that don't have a strtoll() on their own).

This is made to prevent compiler warnings.