producer: fix panic when conn is never assigned
Merge pull request #82 from mreiferson/producer_panic_82

producer: panic on error before first connection
config: document tls_v1
Merge pull request #81 from mreiferson/tls_updates_81

auto enable TLS negotation when setting other TLS options
consumer: send RDY before FIN/REQ
Merge pull request #83 from mreiferson/backoff_rdy_83

consumer: send RDY before FIN/REQ