to <sys/types.h> and <sys/stdint.h>.
* Add a new C99 <stdint.h> header, which provides integer types of
explicit width, related limits and integer constant macros.
* Extend <inttypes.h> to provide <stdint.h> definitions and format
macros for printf() and scanf().
* Add C99 strtoimax() and strtoumax() functions.
* Use the latter within scanf().
* Add C99 %j, %t and %z printf()/scanf() conversions for
intmax_t, pointer-type and size_t arguments.
been around since 386BSD-0.1 import; they have been present in 4.4BSD-Lite
at least, can't currently check if even in 4.3BSD
put note aboud eventual removing of compatibility formats to NOTES, it's
hardly a bug description
Like Plauger's implementation in "The Standard C Library", we use strtod(),
which will limit the range of values that can be converter properly if
long double has greater precision or range than double.
We will need a string to long double function to handle this properly, but
this change is better than the previous behavior of ignoring the existance
of long doubles.
