Here are some leftover references to xman I found after the upgrade to 6.6. Mostly examples, mentions, and configs. I think the most significant one is the missing man page that xmore references.
/usr/X11R6/man/man1/appres.1: % appres Xman.TopLevelShell.Form xman.topBox.form will list the resources of widgets of xman topBox hierarchy. /usr/X11R6/man/man1/editres.1: For example, xman only creates the widgets for its topbox when it starts up. None of the widgets for the manual page window are created until the user actually clicks on the Manual Page button. If you retrieved xman's widget tree before the the manual page is active, you may wish to refresh the widget tree after the manual page has been displayed. This will allow you to also edit the manual page's resources. /usr/X11R6/man/man1/fvwm.1: When sloppy focus is used as the default focus style, it is nice to make windows in which you do not typically type into (xmag, xman, xgraph, xclock, xbiff, etc) click-to-focus, so that your terminal window doesn't lose focus unnecessarily. ... + "Xman" Exec exec xman ... Style "xman" Icon xman.xpm /usr/X11R6/man/man1/xmore.1: SEE ALSO X11(7), xman(1) -alfred