And some shell simplification.

The kresd installation how-to was outdated. Kresd is now default on
Omnia and new versions are not available for Turris, so it does not make
sense to offer this guide anymore.

This is a hack. Verbosity is increased till kresd restart.

Dig has verbose output which gets handy when there are some weird problems.

Forwarders are listed in /tmp/resolv.conf.auto
and we want to see them as well.

Root key is not a sensitive information and it is easier
to work with raw data instead of MD5 hash.

uci show resolver displays data for both resolvers at once
and show kresd/unbound does nothing.

The idea is to use kernel NIC trigger for LED. The sfpswitch for
TurrisOS has to disable LED functionality.