[Voyage-linux] Circumvent ext2 problems, using ext3

[Teco Boot]

I have seen some problems with the ext2 filesystem, because
device was left in rw mode after maintenance, and went power-down.
Now I swapped to ext3, and still keep filesystems (on flash) in ro
as much as possible. This circumvent the ext2 problems seen before.
Any opinions on drawbacks?
Accept this change in a next Voyage distribution?

Thanks, Teco