make the progress meter more accurate for large files. Also made the sprintf
usage in that function avoid floating point.

argument passing and try to convert to double only when providing data to the
external world.

they don't respond to email

certainly doesn't need the OS define.

within the switch.

result as bool

connect.

to make it more like other OS strings

It is only undefined when this file is included by others (like ares) and
in those cases it doesn't matter.

defines are in setup.h.

the external curl include dir.

DEBUG_THREADING_GETHOSTBYNAME is defined

operation as a size_t