Comment 0 for bug 1621393

1. vagrant init ubuntu/xenial64
2. vagrant up
3. vagrant ssh xenial
4. ping google.com

Expected result:
- ping succeeds

Actual result:
- name resolution fails

Inspecting closely reveals that this image has a 0-length /etc/resolv.conf. Replacing it with a symlink to /run/resolvconf/resolv.conf fixes things.