Add initial support for HTTP proxy basic authentication.

[cedric-vincent]

No description provided.

[tadzik]

I like the patch and I'm going to accept it, but in the current state it introduces MIME::Base64 as a mandatory dependency, and I'd really like to avoid that. Could you change the patch so it loads MIME::Base64 conditionally at runtime, as in: require MIME::Base64 and then if ::("MIME::Base64")? (Writing from memory, the syntax might be slightly different)

[tadzik]

I'm not really keen on growing the in-house HTTP client, so I'm going to close this and open a ticket that'll eventually solve the problem.