Enabling selinux by default is more trouble than it's worth, even in permissive mode - breaks docker
Adding more settings for Docker - enabling swap support and disabling selinux/iptables
patching bug with guest additions 4.3.10 https://www.virtualbox.org/ticket/12879
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Adding more settings for Docker - enabling swap support and disabling selinux/iptables
  Enabling selinux by default is more trouble than it's worth, even in permissive mode - breaks docker