bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPL

bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

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lint: warn about extern declarations outside headers

https://mail-index.netbsd.org/tech-userlevel/2023/03/15/msg013727.html

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRI

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

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-Wstringop-truncation is only gcc.

Ignore strncpy(foo, bar, sizeof(foo)) for the wtmp fields where we don't
want NUL termination. We can't use pragma's because the old gcc complains
about the new warnings it does not understand.

Document opendisk1() - it has been around long enough.
(pity about the name...)

XXX pullup-8

Add man page links for:
EV_SET to kqueue(2)
getmntoptstr, getmntoptnum, freemntopts to getmntopts(3)

Reviewed by wiz@

Make this portable to other OSs

Implement pidfile_lock, pidfile_read and pidfile_clean.

Discussed on tech-net@, ok core@.

Add kinfo_getvmmap from FreeBSD

Add ereallocarr(3) to libutil

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

Older version reviewed by <riastradh> and <christos>

add estro{i,u} (Kamil Rytarowski)

document login_getpwclass(3)

Add getbyteorder() call.

- add getdiskrawname.
- exit on error for lint.

add getfsspecname

These directories default to WARNS?=5

- add strspct
- be explicit about string not being NUL terminated if bufsiz == 0

add manual page

Add proc_compare

Don't use = to assing SRCS, but += so that we can remove snprintb.c,
which was added elsewhere.

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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Build libutil(3) as a link to util(3).

add strpct, requested by joerg

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