#4 diff to support proxy auth in Lwp/Authen/Basic.pm

[Nicolas STAMPF]

I needed to pass through an authenticating proxy (Basic
scheme). I hence patched the aforementioned file to
support http_proxy_user and http_proxy_pass, just like
perl's PPM command.

It's working for me (WinNT, netcache proxy with Basic
auth).

I don't know if I did everything right, but I tried. I'm not
a perl guru :)

[Nicolas STAMPF]

Diff for Basic.pm