store the http code

on how to approach the -# progress bar in the new style transfers...

I didn't get that far! ;-)
I also made curl *not* prevent the progress meter even if the output is a tty
when your uploading (it is still done when downloading though). A HTTP POST
is in that sense seen as an upload. It seemed so confusing that ftp upload
doesn't display a progress meter by default.

added lastshow to the progress struct

wide and made the pgrsUpdate() make a final meter update so that the final
values actually are displayed last.

now uses the new progress meter functions

* I hope I finally removed 'empty cookies' crash

  deal with any-length lines, removing the previous limit of 4K.