Soften alerts about unreachable sites

templates/health.d/httpcheck.conf

+ template: httpcheck_web_service_unreachable
+ families: *
+       on: httpcheck.status
+    class: Errors
+     type: Web Server
+component: HTTP endpoint
+     calc: ($httpcheck_no_web_service_connections >= $httpcheck_web_service_timeouts) ? ($httpcheck_no_web_service_connections) : ($httpcheck_web_service_timeouts)
+    units: %
+    every: 10s
+     warn: ($httpcheck_no_web_service_connections >= 30 OR $httpcheck_web_service_timeouts >= 30) AND ($httpcheck_no_web_service_connections < 50 OR $httpcheck_web_service_timeouts < 50)
+     crit: $httpcheck_no_web_service_connections >= 50 OR $httpcheck_web_service_timeouts >= 50
+    delay: down 5m multiplier 1.5 max 1h
+     info: ratio of failed requests either due to timeouts or no connection over the last 5 minutes
+       to: webmaster
+
  template: httpcheck_web_service_slow
  families: *
        on: httpcheck.responsetime