Checkmk Werk 14777: Add queue usage counters to status table

ID: 14777 Title: Add queue usage counters to status table Component: Livestatus Level: 1 Class: New feature Version: 2.2.0i1 Add 6 columns to the status table in livestatus: carbon_queue_usage, carbon_queue_usage_rate, influxdb_queue_usage, influxdb_queue_usage_rate, rrdcached_queue_usage, rrdcached_queue_usage_rate. Usage is defined as the approximate size of the queue passing the data to its connection over the total size of the queue.