Diffs for NetBSD-current 3.99.11

[YAMAMOTO Takashi]

> yamt & lha, I would appreciate if you would look this over and make sure
> it seems correct to you...

why you think __NetBSD_Version__ check is necessary?
otherwise, the diff itself seems logical.
i'm not sure why these VOP_TRUNCATE and VOP_UPDATE are there
at the first place, tho.

btw, doesn't this need something like nfs_bio 1.85 ?

YAMAMOTO Takashi