<util.h>: Need <sys/featuretest.h> for _POSIX_C_SOURCE.

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

Implement pidfile_lock, pidfile_read and pidfile_clean.

Discussed on tech-net@, ok core@.

add kinfo_getvmmap() decl

Add ereallocarr(3) to libutil

ereallocarr(3) wraps reallocarr(3) and embeds return status validation.

Older version reviewed by <riastradh> and <christos>

add estrto{i,u} (Kamil Rytarowski)

Add getbyteorder(void) prototype.

Over the years this header gained a lot of disparate functionality
and willy nilly people kept adding headers appropriate to the new
functionality So we reached where we are today, this header cause

Over the years this header gained a lot of disparate functionality
and willy nilly people kept adding headers appropriate to the new
functionality So we reached where we are today, this header causes
lots of namespace conflicts (for example you cannot use util.h from
a lex file, because ECHO is macro used in lex, and ECHO is defined
to 8 in termios). Roll back time, and remove all the unnecessary
includes, leaving it to the program to include the ancillary headers
they need.

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add getdisk{raw,cooked}name

add getfsspecname

strspct

getfstypename addition

Add getlabelusesmbr(), as proposed in
http://mail-index.netbsd.org/tech-userlevel/2011/08/25/msg005404.html
This is used by disk tools such as disklabel(8) to dynamically decide is
the undelyling pla

Add getlabelusesmbr(), as proposed in
http://mail-index.netbsd.org/tech-userlevel/2011/08/25/msg005404.html
This is used by disk tools such as disklabel(8) to dynamically decide is
the undelyling platform uses a disklabel-in-mbr-partition or not
(instead of using a compile-time list of ports).
getlabelusesmbr() reads the sysctl kern.labelusesmbr, takes its value from the
machdep #define LABELUSESMBR.
For evbmips, make LABELUSESMBR 1 if the platform uses pmon
as bootloader, and 0 (the previous value) otherwise.

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prototype for strpct

pw_error is documented to be dead

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 a

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.

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Consistently use __printflike and __scanflike.

retire pw_policy(3) -- it is not found useful, there are other
(more common) ways to enforce a password strength policy
approved by elad

In a furious blaze of *facepalm* / "what was i thinking?", fix the
open routine function pointer prototype of opendisk1() to match
the prototype of open().

Add opendisk1(), which functions like opendisk(), but takes a function
pointer to the routine to be used for open().

Implement snprintb_m(3) to provide multi-line bit/bit-field decode.
Discussed on tech-kern.

merge christos-time_t

humanize_number was the only function in <util.h> that is not in libutil.
Move it to stdlib.h and add dehumanize_number.

don't use u_long because it is present only with _NETBSD_SOURCE

Add raise_default_signal(3) -- raise the default signal handler.
Can be used by applications that have their own SIGINT (et al)
handlers and want to exit in a manner that correctly
signals to the par

Add raise_default_signal(3) -- raise the default signal handler.
Can be used by applications that have their own SIGINT (et al)
handlers and want to exit in a manner that correctly
signals to the parent that the process was terminated by a signal.
See http://www.cons.org/cracauer/sigint.html for more info.
Discussed on tech-userlevel@.

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add estrndup()