cvsgraph(1) on Linux
The text aebb2d153a54, as Debian 4.0 (Etch) shipped it.
A CVS/RCS repository grapher
Flags it lists
-
-I -
-M -
-O -
-S -
-V -
-b -
-c -
-d -
-h -
-i -
-k -
-m -
-o -
-q -
-r -
-s -
-u -
-x