C++11 no longer requires __STDC_LIMIT_MACROS, __STDC_CONSTANT_MACROS or
__STDC_FORMAT_MACROS to be set for the C headers to work.

Remove clause 3 and 4 from TNF licenses

* Move definitions of exact-width integer types from <machine/types.h>
to <sys/types.h> and <sys/stdint.h>.
* Add a new C99 <stdint.h> header, which provides integer types of
explicit width, rela

* Move definitions of exact-width integer types from <machine/types.h>
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.

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Define intptr_t and uintptr_t via <machine/int_types.h>.

Fix copyright typos...

Add an <inttypes.h> implementation; we'll also make it accessible as
<sys/inttypes.h> in order to let kernel source access its type definitions.