Add a changelog entry for the SSF wire protocol
## Added
* New [configuration option](https://github.com/stripe/veneur/pull/233) `statsd_listen_addresses`, a list of URIs indicating on which ports (and protocols) veneur should listen on for statsd metrics. This deprecates both the `udp_address` and `tcp_address` settings. Thanks [antifuchs](https://github.com/antifuchs)!
+* New package `github.com/stripe/veneur/protocol`, containing a wire protocol for sending/reading SSF over a streaming connection. Thanks [antifuchs](https://github.com/antifuchs)!
# 1.6.0, 2017-08-29
