Sprinkle <sys/featuretest.h> where _*_SOURCE macros are consulted.

Otherwise, the feature tests might come out wrong. For example,
header files that check for _NETBSD_SOURCE won't get the default when
no other _*_SOURCE macros are defined; header files that check for
_POSIX_C_SOURCE might miss _XOPEN_SOURCE, which is supposed to imply
a corresponding _POSIX_C_SOURCE.

PR lib/58752: various header files test _*_SOURCE macros but don't
include sys/featuretest.h

branches: 1.10.2;
make all QUAD constants look the same.

Fix wrong scoping of {U,}LLONG_MAX. More cases, not just amd64.
PR 53298 from Roberto E. Vargas Caballero.

branches: 1.8.26; 1.8.28;
Since all our compilers support __DBL_* and __FLT_*, use them to define
{DBL,FLT}_{DIG,MIN,MAX}

branches: 1.7.4; 1.7.8;
add missing SSIZE_MIN

branches: 1.6.2;
- Normalize inclusion protection (remove)
- Move CHAR_{MIN,MAX} to a common file.
- Fix broken comments

branches: 1.5.8; 1.5.12;
1. MB_LEN_MAX switch MD to MI.
2. unfortunately hppa's MB_LEN_MAX is defined incorrectly 6 instead of 32
so we have to add more setlocale(3) __RENAME func, __setlocale50.
3. move setlocale1.c and setlocale32.c to lib/libc/compat/locale/*
prepareing for next libc major crunk.
4. bump libc minor version.

branches: 1.4.20; 1.4.40; 1.4.42;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Fix definitions of UCHAR_MAX/USHRT_MAX and related
types. C99 requires that these definitions promote to (signed/unsigned)
integer the same way as the types the definition is for. And since
unsigned char/short fit into an "int" on all our archs and thus promote
to signed int, the definitions must not be unsigned.
Fixes PR lib/31306 by Neil Booth.

branches: 1.2.4; 1.2.8; 1.2.14; 1.2.24; 1.2.32; 1.2.38; 1.2.42; 1.2.44;
integrate kauth.

branches: 1.1.2; 1.1.4; 1.1.6;
Initial import of arch/ia64 sources.
These sources are ported from FreeBSD/ia64 code.
See individual source files for credits.
In addition, code from NetBSD/alpha NetBSD/sparc64,
NetBSD/i386 and NetBSD/amd64 were used as templates,
along with my own additions.