man pages: Note that votequorum's allow_downscale is unsupported

Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>
Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>
cfgtool: return error on reload failure

If reload fails, return code is set to value >0 to indicate error.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>