Request to add a new statistic: "recursive client high water" in rndc status and stats channel
For administrators wishing to tune the "recursive-clients" parameter (https://bind9.readthedocs.io/en/v9.18.25/reference.html#namedconf-statement-recursive-clients), it would be useful to see a "high water mark" so that they know how high the number of simultaneous recursive clients has gotten. This would inform if they should raise the default limit or if they need to raise the limit further. Attempting to watch the recursive clients: 0/900/1000 stat in rndc status or the statistics channel is problematic at best as it clears quickly so you would need to catch it at the right time.
Propose to add: Recursive high water: <int> that would work in the same way as: TCP high-water: 3 to both the rndc status output as well as the output from stats channel:
"TCPConnHighWater":3,perhaps:
"RecursivHighWater": <int>