New winetricks-20080409: new verb vista, don't get confused by WGETRC, use curl and openssl if needed

[Dan Kegel]

Another day, another winetricks.

Version 20080409 has the following changes:

Added winver=vista, since I found an app that refuses to install
if winnt <= 502.

Use curl and openssl instead of wget and sha1sum if needed (e.g. on
mac), as suggested by Ryan Schmidt

Use -nd option with wget, as suggested by Hin-Tak Leung

As always, winetricks is available at
   http://kegel.com/wine/winetricks