Probe extended memories before pmap_boostrap() for actual fix of PR/45915.

Also expand expected maximum extended memory regions to recognize
upto 1008 MB RAM that is supported by the XM6i emulator.

See my post on port-x68k@ for more details:
http://mail-index.NetBSD.org/port-x68k/2013/10/19/msg000039.html

Probably worth to pullup to netbsd-6.
Note that NetBSD/x68k now supports upto 1008 MB extended memory found on XM6i.
Revert mi because the added line refers to an imaginary file.
install lua.h
lua.h is not imaginary anymore
grep-2.15 out.
sort
Add "make sortlists", for sorting the set lists.  This may be
run manually, before committing changes to the lists files.
refer to __USE(3)
Fix memory leak in gensub()
vfs.wapbl.flush_disk_cache is more about metadata than data, and
more about safety in the event of power loss than safety in the
event of a crash.
Remove trailing whitespace.
Fix date and remove superfluous comma.
missing word
Add man mage links for __debugused(3) and __diagused(3).
More user friendly sqlite.open() function.
Add a few more symbols.
Register all function in the sqlite table.
add a sqlite(3lua) manual page
Give the hypercall interface a version number.  This is for
implementations outside of the tree.
Note some BPF and NPF changes.
vttodt_tab: index in C99 way, makes it less error-prone.