adjusted progress bar
user agent sent when talking non-http through a http proxy

properly when the new URL is an absolute one to a different port than the
first URL...

the proxy server data internally as it did, since when doing a location:
following it needs the proxy server string several times.

the download (MT-adjustment)

HAVE_UNISTD_H is now not set if VC6 is defined

http_code in -w fix
MS VC++ fixes
documentation updates
-D update
OS/2 port

sooner