http-basic doc need amending

[krisleech]

In the http-basic section it says to add (wrap-authentication), but it seems that (wrap-authorization) middleware is also needed.

Without this middleware no 'basic auth' dialog is shown to enter the username/password.

This caught me out because it didn't even occur to me that I needed to add "authorization" to do "authentication".

Thanks!

[terop]

I created a PR to fix this issue: https://github.com/funcool/buddy-auth/pull/81