Hello,

As I need to access some of my git repositories behind a corporate company 
firewall, I use the http access method. And, as I don't want my passwords to be 
sent in clear text over the network, I have configured my web server to use « 
Digest » authentication instead of the old « Basic » authentication.
This authentication method is now well handled by modern software.

Unfortunately, current git version only handles « Basic » authentication.
When attempting to access my repository, I get the following error message:

error: The requested URL returned error: 401 while accessing 
http://XXX@YYY.ZZ/test.git/info/refs

The web server, on its side, has refused the transaction because of the wrong 
authentication method used:

Digest: client used wrong authentication scheme `Basic': /test.git/info/refs

The attached patch makes git configure libcurl to negotiate the most suitable 
HTTP authentication method.
Thanks to that patch, I manage to clone and fetch my git repository hosted on 
my web server requesting an authentication through the « Digest  » method.

Lénaïc.