can't be opened

"http://somehost?data" as it added a slash too much in the request ("GET
/?data/"...). Added test case 260 to verify.

or the test is skipped. Ideally, we should let this test case go over a few
frequently used IPv6 localhost aliases...

Added resolve.c to simply resolve a given host name

and sockfilt.c. For good-to-have functions for the servers written in C.

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.

test 154

that!