What list to use?

[don fisher]

If one discovers a missing piece in the system, to which mailing list 
should it be reported? For example, trying to run grub2-mkrescue results 
in the error:

/usr/bin/grub2-mkrescue: line 310: xorriso: command not found

I assume that when grub2-mkrescue was loaded, it was assumed that 
xorriso would be there. The --help says:

Usage: grub2-mkrescue [OPTION] SOURCE...
Make GRUB rescue image.

   -h, --help              print this message and exit
   -v, --version           print the version information and exit
   -o, --output=FILE       save output in FILE [required]
   --modules=MODULES       pre-load specified modules MODULES
   --rom-directory=DIR     save rom images in DIR [optional]
   --xorriso=FILE          use FILE as xorriso [optional]
   --grub-mkimage=FILE     use FILE as grub-mkimage

grub2-mkrescue generates a bootable rescue image with specified source 
files, source
directories, or mkisofs options listed by: xorriso -as mkisofs -help

Option -- switches to native xorriso command mode.

Report bugs to <bug-grub at gnu.org>.
Mail xorriso support requests to <bug-xorriso at gnu.org>.

Don