Calculate "notify hour" using a better PHP method

Use date(“H”) and compare it to the desired hour.
GSB filter - update URL keepalive to alert parent we are working

The GSB daily filter could get caught in very long examinations of URLs
and appear to the cyberspark parent as if it had become unresponsive.
Now, after every 100 URLs checked, we update the URL keepalive file.
Detect HTTP result 521 (from Cloudflare)

Cloudflare returns HTTP result 521 when underlying host has become
unresponsive. Insert a remark in our results explaining this. Helps
newbies understand Cloudflare better.
Modify init.d script to get cleaner daemon startup

Changed which params are being used to launch the daemon into the
background. Eliminates need to start using nohup. Remember to give file
‘execute’ permissions to allow ‘service’ to run it.