lib/progess.c file, and is now used with the new progress callback function

files depend on that as well. It turned out Borland has no unistd.h file
either, only mingw32 seems to use that.

clean up the headers better

sooner

Ultrix by Damien Adant <dams@usa.net>.

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.

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

sorted out the -y and -Y confusion in the help texts