ldns-compare-zones(1) on Linux
The text 8c37e07cf37c, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
read and compare two zonefiles and print differences
Flags it lists
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-a -
-c -
-d -
-h -
-i -
-s -
-v -
-z