sometimes the server can start but curl cannot speak to it, and then we must
remember the server (in order to kill it properly) anyway.

Also, make sure to kill all servers on exit everywhere.

(problem identified by Dan F)
2. initial text mode fix for file checks, to allow better text file testing
on windows (with regard to line endings)
3. fixed to use the proper ftpserver pidfile to find pid

.netrc, and when following a Location: the subsequent requests didn't properly
use the auth as found in the netrc file. Added test case 257 to verify my fix.

"remaining: [time]" outputs to hint users about what to expect

used the default port. He was right. I fixed the problem and added the test
cases 521, 522 and 523 to verify the fix.

libcurl didn't properly send an Expect: 100-continue header. It does now.

level stuff. The FTP server communicates with sockfilt using perl's open2().
This enables easier IPv6 support and hopefully FTP-SSL support in the future.
Added four test cases for FTP-ipv6.

stdout, since I've found cases on Solaris where the second output mixes with
the first and thus the big check-script doesn't properly find the first
string in the output stream.

kind of tests we have and how many tests that test certain features

when the response come in many small chunks.

update the docs accordingly

CURLOPT_SSL_CTX_FUNCTION (yet).