update from margo

daddr_t => ufs_daddr_t

changes for 4.4BSD-Lite requested by USL

4.4BSD snapshot (revision 8.1); add 1993 to copyright

Extend lfs_seglock and lfs_segunlock to allow the same process
to continue adding to a segment when it requests a seglock. lfs_seglock
and lfs_segunlock are really the entry and exit routines to wr

Extend lfs_seglock and lfs_segunlock to allow the same process
to continue adding to a segment when it requests a seglock. lfs_seglock
and lfs_segunlock are really the entry and exit routines to writing.

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describe ap (Kirk); delete lfs_mntinvalbuf, lfs_vinvalbuf, add
lfs_seglock/unlock

directory ops, unmount, minor cleanup; from Margo Seltzer

vnodeop argument macro expansion

vnode interface conversion

move lfs_ifind into lfs_inode.c, it's only used in one place

changes to make lfs_vget retrieve the IFILE inode like any other
inode

lfs_itod CAN return LFS_UNUSED_ADDRESS since lfs_bmapv and lfs_markv
can be passed blocks which belong to deleted files.

delete LFS_IRELEASE, just do a brelse

inline lfs_iset in lfs_segment.c; use LFS_IRELEASE/LFS_IWRITE macros

LFS version 2; move lfs_getversion to lfs_segment.c

reorganization to move ufsmount ops to be vnode ops; blkatoff

fix copyright, this was done from scratch

UFS/FFS split for LFS version 1; lfs moves down one level