I created a patch, which does

 - fix alignment issues with vptofh
 - fix alignment issues with fhtovp
 - get rid of static limit for filehnandlesize (VFS_MAXFIDSIZ)
 - version the getfh syscall and adapts all in-tree userland

I think I got the core NFS part right, but the nqnfs changes need review
(and/or we might revisit them - I wanted to get the alignment stuff fixed
ASAP and chose the easy way here, a later change would be in-kernel only).

I'm pretty unsure about the LFS parts too.

Any comments, bugfixes, suggestions welcome.

The patch is a bit largish, so I put a compressed version at

  ftp.netbsd.org:/pub/NetBSD/misc/martin/getfh.diff.bz2 (14k)

Martin