we return a set of headers not more. This enables FTP operations that don't
transfer any data, only perform FTP commands.

is not dealt with when we find an end-of-response line, as there might be
important stuff even after the correct line. So on subsequent invokes, the
cached data must be used!

attempting to use EPSV before the standard PASV.

makes it work reaaaaly nicely on IPv6-enabled hosts!
Added SIZE before RETR is made, always done on downloads. It makes us know
the size prior to download much more frequently.
Unfortunately, this breaks all the FTP test cases. *fixfixfix*

We should add some configure tests for this!

this looks a bit better ;)

the server when that's the only error

- which now is made using a macro named FTPSENDF. I turned it all caps just
to make it more visible that it is in fact a macro.

same socket and it was available from the passed-in struct anyway!

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

RETR fails, this corrects it.

8 this looked quite funny :)

Added a small formatting section for vim at the bottom, it also contains an
emacs portion (copied it from another project I'm working on), I don't know
if this is correct, but its a step (the vim part is correct :)

be posted in a minute to the libcurl list.

huge monster function _ftp() into more little functions. There are still
more that can be done, but this is at least improving readability and
maintainability... :-)

  Use a more appropriate variable name
</couldn't resist>