Apparently a recent round of vandalism by the C++ standards committee
includes disallowing the standard and historic type name "unsigned". Add
a gratuitous "int" to recent changes.

C++ is really a blight on the world.

u_char, u_int, u_long -> unsigned char, unsigned, unsigned long

This makes these headers work without _NETBSD_SOURCE.

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

branches: 1.20.10;
Remove clause 3 and 4 from TNF licenses

branches: 1.19.16;
add a NULL callback initializer

sprinkle __UNCONST

de-__P -- the hack is long since useless. Discussed with christos,
matt, kleink, others. Approved by christos.

* Improve the comments in <nsswitch.h>
* Provide some more useful default ns_src arrays.

* Re-number NS_FORCEALL from 1<<7 to 1<<8, moving it out of the "public"
bitrange for nsdispatch(3) return values.
* Tweak documentation comments in nsswitch.h
* Ensure the result from the back-end method is masked with
NS_STATUSMASK before nsdispatch(3) returns it.

Implement NS_FORCEALL, which may be set in defaults[0].flags by a caller of
nsdispatch(3) to indicate that all available database methods for a source
will be invoked. This is useful for functions such as endgrent(3).

Add support for dynamically loading nsswitch modules on ELF platforms.
Adapted from FreeBSD. Maintains full backward API / ABI compatbility
with built-in-only nsdispatch().

While here, also make nsdispatch() itself thread-safe.

Remove variable names from prototypes.

remove declaration of _nsyylineno from here.

Declare _nsyylineno as extern since it belongs in the data section
(due to being initialised in nslexer.[cy]).

Remove 'extern' from function declarations.

branches: 1.8.2;
change retval of _nsdbtaddsrc and _nsdbtput

branches: 1.7.4;
use _BSD_VA_LIST_ from <machine/ansi.h> instead of using va_list from
<[stdarg,varargs}.h>. as recommended by Klaus Klein.

always add compat functions in NS_COMPAT_CB; make it the responsibility of
the methods to check that yp/hesiod is supported.

* support extra two arguments to nsdispatch():
const char *method /* method name for dynamic linking */
const ns_src defaults[] /* list of defaults */
* bring ns_src into the public arena for above
* make NS_xxx_CB() expand to nothing instead of { src, NULL } - makes
the tables smaller
* convert 'typedef struct xyz { ... } xyz' -> 'typedef struct { ... } xyz'
(which is how it used to be before i experimented with (and ditched) TAILQs)

actually set the cb_data field to the (,C) arg in NS_*_CB()

remove NSSRC_NISPLUS for now, NSDB_NETWORKS is now implemented

merge nsswitch into main branch

branches: 1.1.2; 1.1.4;
file nsswitch.h was initially added on branch nsswitch.