ext4 support on NetBSD

[Mayuresh <mayuresh%acm.org@localhost>]

I am using NetBSD 6.0 and have a requirement to use certain ext2/3/4
partitions.

Since NetBSD 5.0 ext2 and ext3 (as ext2 i.e. sans journaling) has worked
well for me.

I face a need to mount an ext4 partition now for which I don't find
support in 6.0. Wondering whether it is supported in any other release
(>6.0) or whether it will be supported in future.

Mayuresh.