Bug#249199: Flag usrquota/grpquota should check for quota support

[Johannes Lundberg <jojo@infidyne.com>]

Package: partman-reiserfs
Version: 20040515

Flagging a reiserfs filesystem as usrquota/grpquota causes mount to fail
if the kernel doesn't have reiserfs quota support, which the
2.6-kernel in the new Debian Installer doesn't have (version 2.6.5-1).
This problem does probably exist for other filesystems too. Checking for
quota support for the filesystem type might be an idea.

# uname -r
2.6.5-1-k7
# mount /dev/md2 /home -t reiserfs
# umount /home
# mount /dev/md2 /home -t reiserfs -o usrquota,grpquota
mount: wrong fs type, bad option, bad superblock on /dev/md2,
       or too many mounted file systems
#