Solaris support

This is to get solaris2 working for openssh.  This is backwards compatible with old OS and will not break anything.
Perhaps this should be `node['os']`? Because e.g., this would probably work on omnios just fine, but omnios has:

```json
{
  "os": "solaris2",
  "os_version": "5.11",
  "platform_version": "151006",
  "platform_build": "omnios-b281e50",
  "platform": "omnios",
  "platform_family": "omnios"
}
```