Add internal (plumbing) commands from ffoom

This should help test and manage embedded Fastfoo library

src/bin/saturnin.skel

     conf)               inigrep "$@"    ;;
     help)               print_help      ;;
     _ls_subcommands)    ls_subcommands ;;
+    _lsfun)             ffoom lsfun ;;
+    _lsmod)             ffoom lsmod ;;
     *)                  subcommand "$@" ;;
 esac