2016-10-14, Version 6.8.1 (Current)

* build: Fix building with shared zlib. (Bradley T. Hughes) [#9077](https://github.com/nodejs/node/pull/9077)
* stream: fix `Writable` subclass instanceof checks (Anna Henningsen) [#9088](https://github.com/nodejs/node/pull/9088)
* timers: fix regression with clearImmediate() (Brian White) [#9086](https://github.com/nodejs/node/pull/9086)

PR-URL: https://github.com/nodejs/node/pull/9104