renamed all static ^_ftp_* functions to ^ftp_, prefixing with underscore is
not nice

properly match those cookies in subsequent requests

RETR fails, this corrects it.

and providing me with test-certificates that helped me nail the problem with
curl not discovering with a bad certificate was used.

the given URL has no protocol:// part and the Location: redirect contains a
:// section

have a protocol:// part did wrong