sv command does not return documented values for 'check' and 'status' per documentation.

Always returns a zero (true) regardless of up/down/unknown status state.  Needed to return an error value to actually DO the things suggested in services to do dependencies checking.

There's now a workaround for this in meta-runit's runit-base-services package in /etc/runit/functions- but this is intended for more than JUST users of meta-runit.  So...we need to figure out why and fix.