fix locking bug in vm_object_terminate (from hibler)

KNF, and 64-bit safety.

correction to last delta: VM_OBJECT_NULL -> NULL

another relevant fix from Mach 3.0

mods to vm_object_page_clean in support of msync,
keep vmmeter statistics,
get rid of unused vm_object_shutdown,
a couple of vm_object_collapse bug fixes from Mach 3.0.

convert to use new queue structures

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

pedantically ANSI, i.e., nothing after #else/#endif

new cache link names

convert vm_page bit fields to flags

new include format; lint; function prototype

have to avoid use of dequeue which causes problems on the MIPS

merge in 7.7.1.1 (ralphs 3100 changes)

3100 changes (from ralph)

in vm_object_page_clean avoid races with pageout daemon

vm_stat is merged into vmmeter structure;
can_persist and internal bit fields replaced with flags

lint

vm_page_active_count and vm_page_inactive_count move to vm_stat

pmap_remove_all -> pmap_page_protect
copy_on_write bit no longer relied on

update to new CMU copyright and distribution terms

fix includes; new proc struct; rm *_NULL

adopted from Mach 2.5