no fixed port numbers in use anymore. Starting now, the default ports the
servers use are 8990 - 8993. There's no option to modify these yet, but
changing the $base option in the top of the runtests.pl script.
stuff added a few weeks ago. Turns out that if you specify --proxy-ntlm and
communicate with a proxy that requires basic authentication, the proxy
properly returns a 407, but the failure detection code doesn't realize it
should give up, so curl returns with exit code 0. Test case 162 verifies
this.