httxt2dbm(1) on macOS
The text 5c4febf843cc, as Mac OS X 10.8.4, Mac OS X 10.8.3, Mac OS X 10.8.2, Mac OS X 10.8.1, Mac OS X 10.8, Mac OS X 10.7.5 shipped it.
Generate dbm files for use with RewriteMap
Flags it lists
-
-f -
-i -
-o -
-v