Merge from vendor branch TNF:

Merge from vendor branch TNF:
Initial import of p5-Plack-Middleware-Auth-Digest version 0.03 in
the NetBSD Packages Collection.

The Perl 5 module Plack::Middleware::Auth::Digest is a Plack
middleware.  It enables digest authentication. Your authenticator
callback is given an username as a string and should return a
password, either as a raw password or a hashed password.