the pack_hostent() is only compiled if gethostbyname_r() isn't present.

for when gethostbyname() is used so that we have the memory of the struct
allocated. This turns out to be needed if the curl handled is passed between
threads on Windows and possibly other operating systems where we use that
function.

is once again running OK

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)