* New code in shell scripts required killing systemctl in images
* Added tests for the quick IPv6 env hack I made a while back
* Stopped requiring the need for update.sh to copy gravity for alpine
* (moved modifications to dockerfile)
* One step closer to unified start script for both OS versions
* Optimzed some test code
* Sidekick to pi-hole links and queries DNS
* Lookup the default pi.hole against what was fed in as ServerIP
* Lookup a couple outside popular static DNS servers hostnames too
* a little pre-optimized to persist the dig container since docker start adds half a second (no virtually nothing for digs)
This accomplishes the same thing as the previous tests, without using testinfra docker's boilerplate example, which had some drawbacks: Adding @parametrize to the previous version didn't allow overriding the pytest.mark docker arg, image:tag, or cmd with a parametrized test containing different expected results associated with either the alpine/debian tag. Isntead it'd run all the parameters against both tags...e.g. nginx and lighttpd test would run agains both alpine and docker when parametizing on the test level.
