added generation of config.h and a prebuild target to create all neded files.

better support for HUGE files with the -# progress bar

killed trailing whitespace

picky compilers

up, as that can send traces too

mailing list.

if one transfer fails.

the curl_easy_strerror() function to provide one

defined (which it never is atm).

Now, we can focus on making 'runtests -t [num]' work on all test cases and
we should never leak nor crash.

accordingly