kernel - VM rework part 17 - Cleanup
* Adjust kmapinfo and vmpageinfo in /usr/src/test/debug.
Enhance the code to display more useful information.
* Get pmap_page_stats_*() working again.
* Change systat -vm's 'VM' reporting. Replace VM-rss with PMAP and
VMRSS. Relabel VM-swp to SWAP and SWTOT.
PMAP - Amount of real memory faulted into user pmaps.
VMRSS - Sum of all process RSS's in thet system. This is
the 'virtual' memory faulted into user pmaps and
includes shared pages.
SWAP - Amount of swap space currently in use.
SWTOT - Total amount of swap installed.
* Redocument vm_page.h.
* Remove dead code from pmap.c (some left over cruft from the
days when pv_entry's were used for PTEs).
UnifiedSplitRaw
