ok deraadt jmc millert sobrado

From Nicolas Legrand <nlegrand@ethelred.fr>; ok jmc@

ok krw@ millert@

ok deraadt@

open /dev/diskmap and perform a DIOCMAP ioctl in order to open the actual
device. As a result, all programs which make use of opendev(3) can now
operate with disklabel UIDs.
Feedback from millert@
ok millert@ krw@ thib@

and would otherwise result in overflowing the end pointer and
cause strnlen() to return 0.  OK sthen@

Minor bump for libutil.
Previous versions of this diff and man page looked at by various people.
"you should just commit" deraadt

to exist before exit for malloc to dump stats in it.
tweaks from jmc@
ok otto@,jmc@

completeness (verified).

ok millert@ tedu@

brad and millert, with hints from guenther, jmc, and otto I think.
ok previous.

- small tweak while here

teach people bad habits!
ok krw@, jmc@, dlg@, thib@

ok millert@

after the diff was written, I made it similar to the freebsd fix of
the same code; pr6287 ok millert@ guenther@

files or directories when applicable.
The inspiration and name of MACHINE_CPU come from NetBSD, although the way to
provide it to Makefiles is completely different.
ok kettenis@

extra safeguard (FGJ). Idea from deraadt@; ok deraadt@ dlg@

From Igor Zinovik; thanks!
ok millert@

arc4random() is slow, but it induces getpid() calls; also saves a
bit on stirring efforts

doesn't test it, so factor out the two places that test it into a
routine and do the refreshing there.  With this, arch4random_buf()
doesn't trigger superfluous calls to getpid() when filling large
buffers.
ok deraadt@, "looks nicer indeed" otto@

actual kernel page size.

from trhodes@freebsd, r200095;

macros for them. Avoids walking the lists and greatly enhances speed
of freeing chunks in reverse or random order at the cost of a little
space. Suggested by Fabien Romano and Jonathan Armani; ok djm@

from Fabien Romano and Jonathan Armani

Armani

noticed by Jonathan Armani & Fabien Romano
ugh+ok otto@

unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

Okay deraadt@, otto@.

ecvt, fcvt, gcvt, *printf, strtof, strtod, strtold act per ieee
1003.1.  after these massive changes, remove unused files which
would not work now.  reported by Maksymilian Arciemowicz;  ok theo

ok ian@, millert@

to u_int32_t to do integer math with (in a situation where that is legit)
ok otto millert

Someone may have passed a read-only string to putenv() (I'm looking
at you cron!).

standard explicitly disallows passing setenv a name with a '=' in
it but historic BSD behavior is to allow this but to ignore the '='
and anything after it.

-DSHA256_ONLY in order to save space; ok deraadt@

argument if the argument is deemed to be optional ('::').
feedback and ok jmc@ and millert@