I've been playing with the new SSL module, and so far it works great.

However, when using it to connect to a host with a self signed
certificate, verification fails when I specify ssl.CERT_REQUIRED (as
expected).

I know that I'm connecting to a host with a self signed certificate, so
I want to be able to ignore that error. At the moment, the only option I
see is to specify ssl.CERT_NONE and verify the DER certificate by hand.

It would be great if I could specify a callback function that can ignore
certain errors, and does additional checking.