Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix the type for hw.ncpu, so sysctlbyname doesn't consistently fail on
64-bit architectures where sizeof(int) != sizeof(size_t).

MFC after: 1 week
PR: 206758
Reported by: Christoph Schönweiler <public2016@hauptsignal.at>
Submitted by: kib
Sponsored by: EMC / Isilon Storage Division

Fix releasing the lock in the parent atrun process after the queue
directory has been processed. Otherwise, a long-running child process
caused other atrun invocations to stall unnecessarily.

Add the name of the file that could not be opened to the error message
regarding the failure.

Suggested while working on PR bin/113239.

Prevent races running the queue by serializing access to the
queue directory.

PR: bin/113239

atrun(8): scale default load average limit with the number of CPUs

Previously atrun refused to run jobs if load average was not below fixed limit of 1.5.

PR: 173175
Reviewed by: peterj
Approved by: trasz (mentor)
MFC after: 2 weeks

atrun: Do not assume that MAXLOGNAME <= 100.

The reserved space for fmt was exactly sufficient for a two-digit value of
MAXLOGNAME - 1.

PR: bin/171815
Submitted by: Jeremy Huddleston Sequoia
MFC after: 1 week

Don't use UT_NAMESIZE here to determine the maximum username length.

Add PAM support to atrun(8).

Actually use new features of perr() and perrx().

Make perr() variadic and add perrx() to use in cases where
errno is irrelevant. Some code duplication can be reduced
if perr() is variadic and perrx() is available.

Use a single setusercontext(3) instead of a bunch of basic syscalls.
Besides aesthetic benefits, that makes at(1) jobs subject to such
login.conf(5) settings as resource limits.

Spotted another copy of the loony error message.

Fix an error message that was beside the point.

Fix a typical off-by-one error that can result in an unterminated string:

strncpy(dst, src, sizeof(dst));

by substituting the safer strlcpy() for strncpy().

X-Security: none (the source string isn't user-supplied)

Don't be sexist - fix a typo.

Fix a few cases that relied on 'implicit int' (constraint violation in C99).

o Eliminate __P
o Use new-style function definitions
o remove some !__STDC__ code
o eliminate register

by by -> by

Obtained from: OpenBSD
MFC After: 1 week

Don't hard-code a buffer size

$Id$ -> $FreeBSD$

Fixed printf format errors.

Cosmetic in error strings. Sort Xrefs. Add usage (with syslog capability).

Do setlogin() before changing uid/gid, since
`at/batch' requires this.

Obtained from: me && OpenBSD

Submitted by: Philippe Charnier <charnier@xp11.frmug.org>
Fixes name size limitation (was hardcoded to 8).
Closes PR#3258

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Check for expired passwords before allowing access to the system.

Upgrade to 2.9

Remove trailing whitespace.

Add some useful sendmail options

Upgrade.
Close security holes reported.

Added the Linux atrun command as hacked by Chris Demetriou for NetBSD.