[chef-dev] Ohai 8.1.0 Released

[Jay Mundrawala < >]

Hey Chefs,

We've just released Ohai 8.1.0 in preparation for Chef 12.1.0.

Check out the changelog below:

* [**Warren Bain**](https://github.com/thoughtcroft)
  Fix for removal of :Config in ruby 2.2
* [**Chris Luciano**](https://github.com/cmluciano)
  Add language elixir
* [**Chris Luciano**](https://github.com/cmluciano)
  Update WARNING for ohai 7 syntax docs page
* [**Malte Swart**](https://github.com/mswart)
  ssh_host_key: detect ed25519 host key
* [**hirose31**](https://github.com/hirose31)
  Detect OpenStack guest server using dmidecode
* [**Chris Luciano**](https://github.com/cmluciano)
  Add language rust.
* [**Tim Smith**](https://github.com/tas50)
  Add additional information on the PHP engine versions to PHP plugin
* [**Paul Czarkowski**](https://github.com/paulczar)
  detect if inside Docker container
* [**Michael Schmidt**](https://github.com/BugRoger)
  OHAI-339 Unable to detect IPAddress on CoreOS/Gentoo
* [**Stafford Brunk**](https://github.com/wingrunr21)
  Digital Ocean ohai/cloud support round
* [**Sten Spans**](https://github.com/sspans)
  Fix network.rb for XenServer Creedence
* [**Shuo Zhang**](https://github.com/zshuo)
  Update linux plugin cpu.rb and spec_cpu.rb to support S390
* [**Alexey Karpik**](https://github.com/akarpik)
  Fix up incorrect cloudstack metadata
* [**Jeff Goldschrafe**](https://github.com/jgoldschrafe)
  cloud_v2 fails to initialize on GCE hosts without external IP
* [**Ryan Chipman**](https://github.com/rychipman)
  Archlinux Version
* [**Jose Luis Salas**](https://github.com/josacar)
  Add a trailing dot to avoid using search option in resolv.conf
* [**Eric G. Wolfe**](https://github.com/atomic-penguin)
  block_device rotational key
* [**Josh Blancett**](https://github.com/jblancett)
  add extra metadata passed in from hints in knife-linode
* Update mime-types dependency

If you notice any issues, please file them at https://github.com/chef/ohai/issues/new

Thanks,
Jay