I noticed a while ago that mount was spewing a lot of repeated mount
information when run on its own to see what is mounted.
The reason is that various "unscheduled shutdowns" left stuff marked as
mounted in /etc/mtab, which therefore grew and grew over time.
It's common to have /etc/mtab as a symlink to /proc/mounts, which knows
the truth about what is mounted right now. Should setup package be
changed to this scheme? I don't know of any drawbacks.