Based on our vfprintf etc. implementations. Wide character parts based on
NetBSD but with lots of macros expanded. Minor bump for libc.
ok kettenis espie

Kernel and bootblocks still use the old 0L value until all the NULL abuses
in the code are fixed.

ok miod@

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.
OK deraadt@

Add new sys/_types.h header
Include machine/_types.h or sys/_types.h where applicable

uptodate, namely, wcsto(u)l(l) family, wcstod, stubs from wctrans/towctrans
crank minor.
okay millert@, jmc@.

so do not redefine it.
Found out by the quite picky fixinc in recent gcc.
okay millert@, kettenis@

* introduce the mbstate_t typedef.
impacts gnu libiconv, which has already been taken care of.
* Prepare for mb stuff to really exist, replace macro MB_CUR_MAX with
an external variable __mb_cur_max (impacts libX11 and various ports).
* use mbstate in all the mb <-> wchar functions with state.
* add a stub iswctype function allowing some ports to compile.
bash and gdiff are missing wcscoll, and need to be told there's no i18n
until this is fixed.
Discussed and matthieu, otto, millert, kettenis, deraadt.
Major libc bump

okay deraadt@, cloder@, pvalchev@
thanks to everyone who commented on that.