we now use it to provide more info back on connect failures.

Also made -t imply -n to disable valgrind, it runs sloooow otherwise.

This now manages to run all tests OK up to test case 100 (the first FTP one)
for me.

system thinks free(NULL) is badness)

take a CURLcode as a second argument, that is non-zero when Curl_done()
is called after an error was returned from Curl_do() (or similar).

to deliver

instead of using snprintf() + strdup().

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.

we typecast on invoke.

causes xlc and gcc act differently on AIX.