Fixes malloc_conceal...freezero with malloc options C and/or G.

ok jmc@, schwarze@

triggered by a question from Jan Stary <hans at stare dot cz> on misc@;
OK otto@

and remove the lie that these functions would set errno;
tweaks and OK jmc@; OK rob@ on the previous version

Discussed with schwarze and jmc. ok schwarze

i.e. those other than LC_CTYPE, into the CAVEATS section, and
standardize wording somewhat.
OK jmc@

OK rob@

Discussed with and ok jmc@, schwarze@, claudio@

ok claudio@

ok claudio@

Discussed with claudio@ and tedu@.

switched to using a local control socket by default.
OK florian@ sthen@

boolean has a contents length other than 1.
ok claudio@

"sure" claudio@

which is reserved for future use.
ok claudio@

on ttyC0.  While here add drm0 to loongson and add the complete set of
wscons and drm devices to arm64.
ok kettenis@

snmpctl. Separate copies of ber.[ch] have existed and been maintained in sync
in ldap, ldapd, ypldap and snmpd.
This commit moves the BER API into /usr/lib/libutil. All current consumers
already link libutil. ldapd and snmpd regress passes, and release builds.
With help from tb@ and guenther@.
ok deraadt@, tb@

ok kettenis

ok deraadt@

counterparts but return memory in pages marked MAP_CONCEAL and on
free() freezero() is actually called.

- put functions and data which are only used before calling the executable's
start function into their own page-aligned segments for unmapping
(only done on amd64, arm64, armv7, powerpc, and sparc64 so far)
- pass .init_array and .preinit_array functions an addition argument which
is a callback to get a structure which includes a function that frees
the boot text and data
- sometimes delay doing RELRO processing: for a shared-object marked
DF_1_INITFIRST do it after the object's .init_array, for the executable
do it after the .preinit_array
- improve test-ld.so to link against libpthread and trigger its initialization
late
libc changes to use this will come later
ok kettenis@

input file or MAKEDEV script itself; sync up the input file. req by jmc@

running a ports bulk without bumping anything else
(matches what's on amd64.ports and exopi)
ok sthen@ phessler@ espie@ naddy@

reported by Fabio Scotoni <fabio at esse dot ch>;
also garbage collect one .Tn while here

found the hard way by nayden@ ok deraadt@

- Write savegames and scorefiles to the current directory instead of /var
- Save oc_name and oc_descr alongside oc_uname in all situations
- When a levitation potion times out, explicitly float down
These patches were contributed last year by "tonypony76"; thanks!
ok deraadt@, with added enthusiasm from tedu@

surround words with double quote.  Also fix a bug in the man page
that module argument was missing for "module set".

near 0.9.7a mistakenly created this incorrect directory.  This was mimicked
into our mtree framework in 1998, where it survived for over 20 years.
ok jsing

ok deraadt

allocate pages, don't call abort() because of corefile data leakage
concerns, but simply _exit().  The reasoning is _rs_init() will only
fail if someone finds a way to apply specific pressure against this
failure point, for the purpose of leaking information into a core which
they can read.  We don't need a corefile in this instance to debug that.
So take this "lever" away from whoever in the future wants to do that.

in. This fixes the case where one would be in a non default rdomain shell then
run an rdomain 0 rc.d daemon.
reported by YASUOKA Masahiko and Pierre Emeriaud
ok sthen@ claudio@ benno@

patch from Peter Piwowarski <peterjpiwowarski at gmail dot com>