TS-2188 healthcheck plugin doesn't parse config files properly

This is part of the fixes to the healthcheck plugins, such that
we don't segfault. This part of the fix actually makes sure we
properly parse the configuration file as was expected.
TS-2188 Never consider a simple / path as a healthcheck

This is an optimization, and a safety net, such that a simple
/ path can never be considered for a healthcheck.
Updated text / format.