The tags reverse-dns and ptr-record are obviously highly related. Are they so related to each other, that it would be better to have them merged as a single tag?
If it is desirable to keep them as separate tags, then what are examples of questions that could reasonably be tagged with one of the two tags, but not the other?
I want to point out that we do have tags for other DNS record types as well, for example cname-record and mx-record. I assume we want to keep this consistent across record types. Does that get en the way of a merge?