Resolve Guest OS DNS Requests Using etc/hosts

When a virtual machine operating in the shared networking mode sends a DNS request, the request is now resolved also using the macOS etc/hosts file.

For example, if your macOS etc/hosts file contains the following entry:

1.2.3.5         testh

and you start pinging testh in a virtual machine, the guest OS will check the macOS etc/hosts file first and start pinging 1.2.3.5.