Support SSL for v0.8.3

[joestein]

Kafka is adding SSL support => https://issues.apache.org/jira/browse/KAFKA-1477 and would be great to have this available in go libraries.

[eapache]

I don't see a super-obvious summary of how this will work, but I'm assuming this is something along the lines of "brokers will listen on an additional port for the existing kafka protocol wrapped in standard ssl"?

[eapache]

This looks like it will be fairly straightforward, we'll just need to use http://golang.org/pkg/crypto/tls/ and add a flag to switch between that and plain connections.

[uovobw]

any news on this? i am planning on exposing a kafka cluster to the net securing it with stunnel and client side certificates. if there already is some code i can contribute to that...

[eapache]

Sarama's support is ready to go... we're waiting on upstream kafka to release this in the broker

[uovobw]

i heard that is scheduled to happen in version 0.9, that might be a long way to come yet.
is there any chance that, with external ssl-termination as i wrote above, this could be pushed earlier?

[eapache]

#156 needs to be rebased and have any merge conflicts resolved, but it should be all you need.

[uovobw]

awesome, i'll get around to it if i get the time. thanks

[uovobw]

@eapache i have submitted a new pr #493 that rebases this change to master (branch support-ssl). tests pass, let me know how i can help

EDIT: a letter

[eapache]

Implemented (for now) by #493