gdp-router-click binary supports systemd notify already, so turn it on in the template
Update script names for consistency with gdplogd scripts.
Change gdp-router-click-wrapper to start-gdp-router-click for
consistency with gdplogd and mqtt-gdp-gateway.
More minor bug-fixes for systemd
Minor bug-fixes to systemd scripts
Significant startup and install changes to convert to systemd. Still
doesn't work for startup, but it does if you manually start it after the
system is running.