As a user, I can configure my remote to use basic auth and proxy without a password
Ticket moved to GitHub: "pulp/pulpcore/2081":https://github.com/pulp/pulpcore/issues/2081
Some providers like packagecloud.io, ask to use basic auth with no password https://packagecloud.io/docs/api.
Without allowing it, our users won't be able to sync from certain providers.
RFC 2617 seems to allow empty passwords https://tools.ietf.org/html/rfc2617#section-2
password = *TEXT