merge of bill's code plus lint (plus, of course, cleanup of bill's bugs)

Merge ... bill's code plus lint (plus, of course, cleanup of bill's bugs)

SCCS-vsn: sys/kern/kern_clock.c 4.54
SCCS-vsn: sys/kern/kern_descrip.c 5.24
SCCS-vsn: sys/kern/kern_proc.c 4.64
SCCS-vsn: sys/kern/kern_prot.c 5.17
SCCS-vsn: sys/kern/kern_resource.c 4.22
SCCS-vsn: sys/kern/kern_sig.c 5.17
SCCS-vsn: sys/kern/kern_time.c 5.15
SCCS-vsn: sys/kern/subr_prf.c 4.27
SCCS-vsn: sys/kern/subr_xxx.c 4.22
SCCS-vsn: sys/kern/sys_generic.c 5.36
SCCS-vsn: sys/kern/tty.c 4.41
SCCS-vsn: sys/kern/tty_bk.c 4.9
SCCS-vsn: sys/kern/tty_conf.c 4.3
SCCS-vsn: sys/kern/tty_pty.c 4.31
SCCS-vsn: sys/kern/tty_subr.c 4.20
SCCS-vsn: sys/kern/tty_tb.c 4.8
SCCS-vsn: sys/ufs/ffs/ffs_alloc.c 2.26
SCCS-vsn: sys/ufs/lfs/lfs_alloc.c 2.26
SCCS-vsn: sys/kern/vfs_vnops.c 4.35
SCCS-vsn: sys/kern/vfs_syscalls.c 4.57
SCCS-vsn: sys/ufs/ffs/ffs_vnops.c 4.57
SCCS-vsn: sys/ufs/ffs/ufs_vnops.c 4.57
SCCS-vsn: sys/ufs/lfs/lfs_vnops.c 4.57
SCCS-vsn: sys/ufs/ufs/ufs_vnops.c 4.57
SCCS-vsn: sys/ufs/ffs/ffs_tables.c 2.4
SCCS-vsn: sys/kern/vfs_xxx.c 4.5
SCCS-vsn: sys/kern/uipc_mbuf.c 1.43
SCCS-vsn: sys/kern/uipc_proto.c 4.28
SCCS-vsn: sys/kern/uipc_socket.c 4.75
SCCS-vsn: sys/kern/uipc_socket2.c 4.37
SCCS-vsn: sys/kern/uipc_syscalls.c 4.46
SCCS-vsn: sys/kern/uipc_usrreq.c 1.10