merge of 4.1b and 4.1c

merge of 4.1b and 4.1c

SCCS-vsn: sys/kern/init_main.c 4.43
SCCS-vsn: sys/kern/kern_clock.c 4.45
SCCS-vsn: sys/kern/kern_descrip.c 5.18
SCCS-vsn: sys/kern/kern_proc.c 4.48
SCCS-vsn: sys/kern/kern_prot.c 5.11
SCCS-vsn: sys/kern/kern_sig.c 5.12
SCCS-vsn: sys/kern/subr_prof.c 4.2
SCCS-vsn: sys/kern/uipc_domain.c 5.6
SCCS-vsn: sys/kern/uipc_syscalls.c 4.36
SCCS-vsn: sys/kern/tty_subr.c 4.17
SCCS-vsn: sys/ufs/ffs/ffs_alloc.c 2.19
SCCS-vsn: sys/ufs/lfs/lfs_alloc.c 2.19
SCCS-vsn: sys/kern/vfs_bio.c 4.39
SCCS-vsn: sys/kern/vfs_cluster.c 4.39
SCCS-vsn: sys/ufs/ffs/ffs_balloc.c 5.3
SCCS-vsn: sys/ufs/lfs/lfs_balloc.c 5.3
SCCS-vsn: sys/kern/vfs_vnops.c 4.30
SCCS-vsn: sys/ufs/ffs/ffs_inode.c 4.31
SCCS-vsn: sys/ufs/ffs/ufs_inode.c 4.31
SCCS-vsn: sys/ufs/lfs/lfs_inode.c 4.31
SCCS-vsn: sys/ufs/ufs/ufs_inode.c 4.31
SCCS-vsn: sys/kern/vfs_lookup.c 4.30
SCCS-vsn: sys/ufs/ffs/ufs_lookup.c 4.30
SCCS-vsn: sys/ufs/ufs/ufs_lookup.c 4.30
SCCS-vsn: sys/ufs/ffs/ffs_subr.c 4.3
SCCS-vsn: sys/kern/vfs_syscalls.c 4.42
SCCS-vsn: sys/ufs/ffs/ffs_vnops.c 4.42
SCCS-vsn: sys/ufs/ffs/ufs_vnops.c 4.42
SCCS-vsn: sys/ufs/lfs/lfs_vnops.c 4.42
SCCS-vsn: sys/ufs/ufs/ufs_vnops.c 4.42
SCCS-vsn: sys/kern/uipc_mu_msg.c 4.2
SCCS-vsn: sys/kern/uipc_socket.c 4.64
SCCS-vsn: sys/kern/uipc_usrreq.c 1.3
SCCS-vsn: sys/vm/vm_swap.c 4.15