Markus Mueller.

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@.

* 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

for the default locale.
comments, tests, okay: kettenis@, otto@, jmc@
functions addition -> Minor bump.
There's a large bump coming in a separate commit.

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

(Nothing activated yet, of course)
okay deraadt@

ok otto deraadt

rescinded 22 July 1999.  Proofed by myself and Theo.

Make sure everything uses {SYS,}LIBC_SCCS properly