automatic dump stats-file needed in 3.1.x

[bsteve99]

I moved to 3.1 to get metrics persistence using stats-file; with the guids/per frontend,backend etc, but can't use it because the ingress controller will not allow me to inject a dump stats-file prior to it issuing a 'reload' on the master socket.

I'm wondering if putting an automatic stats dump triggered from the 'reload' on the master or the shutdown of the old process would be possible. I heard this is being worked on, and hoping it will be backported to 3.0 or 3.1.

Voting +1 for this ask. Sincerely....