Unbound install guide does not clearly state to install root.hints

[jfb-pihole]

The unbound install guide at https://docs.pi-hole.net/guides/unbound/ states the following:

"Optional: Download the list of primary root servers (serving the domain .). Unbound ships its own list but we can also download the most recent list and update it whenever we think it is a good idea. Note: there is no point in doing it more often then every 6 months."

After running sudo apt install unbound on Stretch, I verified that this file is not installed with the install command. This was also noted by a discourse user (https://discourse.pi-hole.net/t/unbound-will-not-start/14327).

Recommend changing this wording in the install guide to the following:

"Optional: Download the current list of primary root servers (serving the domain .). Unbound ships its own list but we can also download the most recent list andUpdate it whenever we think it is a good idea. Note: there is no point in doing it more often then every 6 months or so, as the file changes infrequently."

[AzureMarker]

That sounds fine; do you want to make a PR?

[jfb-pihole]

I will do so.

[DL6ER]

This has been implemented with PR #71.