htpasswd(1) on macOS
The text 1c95ecc32e8d, as OS X 10.10.2, OS X 10.10.1, OS X 10.10 shipped it.
Manage user files for basic authentication
Flags it lists
-
-B -
-C -
-D -
-b -
-c -
-d -
-i -
-m -
-n -
-p -
-s -
-v