[dns-operations] slack.com bogus

[Dave Lawrence]

Michael Sinatra writes:
> I was dead in the water with slack, and upon issuing an 'rndc flush 
> slack.com' to my home DNS resolver, and then doing same to $dayjob (for 
> those using our VPN), everything cleared up.  I'll let everyone here 
> draw inferences.

No inferences needed; that was the right course of action.

Several members of the DNS community have been helping out with
getting caches flushed, alerted both by this list and the DNS-OARC
Mattermost chat server.  Thanks to all, and to DNS-OARC for these
resources.