fallback to the old ftp-one to make old programs work the same

directive.

proceed fine with the already existing options, just having a different
internal library default for capath.

working for "IPv6 enabled" libcurls yet, but should be pretty easy for
someone to adjust.

spelling error

checking for particular errors. curl/curl.h defines the errros

sized buffer that may be passed to a write callback

CURLINFO_REDIRECT_TIME and CURLINFO_REDIRECT_COUNT.

or not

CURLOPT_DEBUGFUNCTION and CURLOPT_DEBUGDATA.

## operator)

with a #define to preserve backwards compatibiltiy