cyrus-mupdatetest(1) on Linux
The text a7c33ea0df7e, as Debian 9 (Stretch) shipped it.
interactive MUPDATE test program
Flags it lists
-
-a -
-c -
-f -
-i -
-k -
-l -
-m -
-n -
-o -
-p -
-q -
-r -
-u -
-v