pointed out by jmc@

spotted by rainer@, ok uwe@

discussed with and ok uwe@

ok fries, hshoexer, claudio

the page as possible (i.e. make malloc option P a default).
ok art@ millert@ krw@

a page to 0. P default will be changed in a separate commit.
ok millert@ art@ krw@

a separate symbolic constant for the leeway we allow when moving
allocations towards the end of a page. No functional change.

to some stupid ipv6 bug in particular), remove that 'listen' from the list
and continue operation.  issue spotted by naddy
ok henning

(might catch errors closer to the trouble spot) and junk fill pages just
before reuse instead of immediate (we can't access the page anyway)
since we set PROT_NONE in the F case. ok djm@

ok jmc@

tried and how many actually succeeded.

requested by many, "just go for it" deraadt@

but that is OK because both minor 3 and 4 now do the same thing.  eventually,
2 releases from now, everyone will have forgotten about minor 4 and we can
delete the support code for it from sys/dev/rnd.c
various versions of this looked at by millert and todd

which only works in w.europe
- use a more realistic value for udcf correction example
- use a GPS-only receiver for "refid GPS" example
suggested/ok mbalmer

threaded case) but much smaller working set; prompted by and ok deraadt@

non-syscalls, there's just too much code not doing the right thing on
error paths; prompted by and ok deraadt@

kurt@

mapping the region next to the existing one first; there's a pretty
high chance there's a hole there we can use; ok deraadt@ tedu@

too much pressure on the amaps. ok tedu@ deraadt@

spamd-setup hanging if there are various (network?) issues and the system
not proceeding to multiuser so that this can be debugged.  We do not use
& for startup in /etc/rc because this makes the spamd-setup a child of the
rc scripts after bootup (that is gross)
Problem reported in PR 5864, change discussed with beck, ok millert

that should expect to read the manual anyway and it's caused some
confusion in the past.
Add example entries for fixed-address and pxeboot.
ok krw@

the offset since we use monotime for these for some time now, and monotime
is not affected by system time changes (like, duh, that was the reason for
the change). PR5927

Closes PR 5625
ok ajacoutot@, jakob@

event. so don't use the word "before" .. and leave the mention ambigious
ok henning

- spamd(8) configuration now lives in /etc/mail, too
- sort some items that were out of order
ok jmc@.  no objections millert@

yes, I know, afs on vax, who would want this?

from Thomas Pfaff.  ok millert@

reason: the parent process must never ever block, but the dns routines can.
last not least this fixes ntpd -s 'hanging' for a long time.
tested by a couple of people

from Loic Tortay via jmc@

- provide proper dtoa locks
- use the real strtof implementation
- add strtold, __hdtoa, __hldtoa
- add %a/%A support
- don't lose precision in printf, don't round to double anymore
- implement extended-precision versions of libc functions: fpclassify,
isnan, isinf, signbit, isnormal, isfinite, now that the ieee.h is
fixed
- separate vax versions of strtof, and __hdtoa
- add complex math support.  added functions: cacos, casin, catan,
ccos, csin, ctan, cacosh, casinh, catanh, ccosh, csinh, ctanh, cexp,
clog, cabs, cpow, csqrt, carg, cimag, conj, cproj, creal, cacosf,
casinf, catanf, ccosf, csinf, ctanf, cacoshf, casinhf, catanhf,
ccoshf, csinhf, ctanhf, cexpf, clogf, cabsf, cpowf, csqrtf, cargf,
cimagf, conjf, cprojf, crealf
- add fdim, fmax, fmin
- add log2. (adapted implementation e_log.c.  could be more acruate
& faster, but it's good enough for now)
- remove wrappers & cruft in libm, supposed to work-around mistakes
in SVID, etc.;  use ieee versions.  fixes issues in python 2.6 for
djm@
- make _digittoint static
- proper definitions for i386, and amd64 in ieee.h
- sh, powerpc don't really have extended-precision
- add missing definitions for mips64 (quad), m{6,8}k (96-bit) float.h
for LDBL_*
- merge lead to frac for m{6,8}k, for gdtoa to work properly
- add FRAC*BITS & EXT_TO_ARRAY32 definitions in ieee.h, for hdtoa&ldtoa
to use
- add EXT_IMPLICIT_NBIT definition, which indicates implicit
normalization bit
- add regression tests for libc: fpclassify and printf
- arith.h & gd_qnan.h definitions
- update ieee.h: hppa doesn't have quad-precision, hppa64 does
- add missing prototypes to gdtoaimp
- on 64-bit platforms make sure gdtoa doesn't use a long when it
really wants an int
- etc., what i may have forgotten...
- bump libm major, due to removed&changed symbols
- no libc bump, since this is riding on djm's libc major crank from
a day ago
discussed with / requested by / testing theo, sthen@, djm@, jsg@,
merdely@, jsing@, tedu@, brad@, jakemsr@, and others.
looks good to millert@
parts of the diff ok kettenis@
this commit does not include:
- man page changes

forthcoming OpenSSL update.
Function names lose their underscore (SHA256_Init => SHA256Init) and
the various SHA256_CTX, SHA512_CTX are merged into a single SHA2_CTX
that is used for all these hashes.
ok millert@ manpage bits jmc@ "please commit" deraadt@