instead entirely rely on the curl_formadd() function. The former one is
subject for removal in a future release.

we check for the error state before believing we are connected in IPv6
cases

IPv6

changed the Curl_connethost() proto again

name resolving, as that should be the *ONLY* section in libcurl that may
take a while in a synchronous call.

valid time. we now store the filetime as a long to know for sure it can
hold -1 (there exist some unsigned time_t cases)

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

properly match those cookies in subsequent requests