replacement for old /etc/mtab that lists only real filesystems like ext4 or fat

[Jan Gregor]

Hello,

  I used /etc/mtab to list mounted filesystems with their mount options.
Unfortunatelly /etc/mtab no longer exists in debian jessie, it is just
symlink to /proc/mounts that lists 31 filesystems and I want to see just 2
:-)  classic filesystems like ext4, fat, btrfs only.

Thanks,
Jan