Rename Why a Spare Router?.md to Why You Should Configure A Spare Router.md

Add test for presence of netperf to betterspeedtest and netperfrunner;

Update label to use top-level DNS domain (from dhcp.dnsmasq.domain);

Add print-router-label.sh script;

Add info for the Power Adapter

Add sample label to the script

Factor out label-printing into print-router-label.sh

Ignore rrul result files

Editorial tweaks;

Add "https://" to missing passphrase message so that the URL can be clicked

Incorporate `-Z passphrase` option for betterspeedtest.sh and netperfrunner.sh

Another link

Fix link

Fix link to script;

Add Why a Spare Router.md;