merge vfs_lock and vfs_busy; interlock mount points properly

convert VOP_LOCK to vn_lock; add parameters to VOP_UNLOCK and vget

change mountlist to CIRCLEQ so we can do unmountall (from mycroft)

massive update to incorporate version 3 protocol from Rick Macklem

conversion to queue.h list manipulation (from mycroft)

convert to vop call

lint

new queue structure; vget now locks optionally

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

bug fixes for LEASES from Rick Macklem

add missing third param for dounmount

update for 4.4BSD from Rick Macklem

MNT_NOFORCE no longer has its own flag

avoid unlocking directories

fix from Jeff Forys for tracking changing NFS file sizes

make kernel includes standard

use new queue routines for buffer lists hanging off vnode

September update from Rick Macklem to add accept protocol to NQMFS

update from Rick Macklem

update to current hashing techniques

delete USES

clean up includes; nfs_netaddr_match goes to vfs_addr.c

new parameters to vinvalbuf; use VOP_FSYNC for vflushbuf

vnode interface conversion

first cut at fixing discconect/reconnect hanging confusion