Haproxy socket is not accepting staples

It complains about something like that the issuer can't be verified but I think that is not a relevant error because when we feed it manually through the socket, it does get accepted. I think maybe we either don't base64, or we maybe do it twice or we use the wrong attribute of the staple object (there are various with additional methods like .raw() IIRC) or whatever, some handling of the staple data is wrong.

@simon can you supply some logs?