to know which daemon cannot background themselves (actually we want to
know the opposite, but there are much more). However, it's only needed in
_rc_wait and rc.subr still does its magic without the need to add `&'.

- prevent a daemon from hanging the boot
(typo in your flagsm e.g. httpd_flags=-d)
- make sure we can get the status of a backgrounded daemon instead of always
returning success
Side effect of this is that we can kill a knob! rip rc_bg :-)
Ports will need love, and a second commit is coming for that.
The diff is small yet not trivial so I am committing early in the release
process in one shot so it can easily be reverted if needed. I started working on
this during g2k16 in Cambridge then finished it in Brisbane for a2k17 where
robert@, beck@ and sthen@ agreed it was the correct way to go and I should move
ahead with it post 6.1.
If you see any regression, please talk to me!

Previously they would be swapped a byte at a time when sizeof(int)
!= sizeof(long).  Idea from FreeBSD.

with the RS780E chipset.
OK kettenis@, jsg@

exceeds 2 lg N and add a reference to the introsort paper.

when the recursion depth reaches 2*lg(n + 1).  This avoids quicksort's
quadratic behavior for pathological input without appreciably
changing the average run time.

side of the array being partitioned to save on stack space.  Greater
savings can be gained by choosing recursion for the smaller side
of the partition and eliminating recursion for the larger side.
This also results in a small but measurable performance gain.
OK otto@ schwarze@

From "fenderq" on freenode via tj@

- document posix_memalign() does not play nice with reacallocarray(3) and
freezero(3)

ok millert@

OK tb@, krw@ (for [[]])
Feedback and OK halex@

OK tb@ halex@

OK reyk mlarkin

The id binary is not available in nfs diskless setups at this point.
reported by Andreas Kusalananda, thanks.
discussed with deraadt@

done in ifstart(). Remove ipv6autoconf() and replace rtsolif with a boolean
variable V6_AUTOCONF. Replace dhcpif with a boolean variable V4_DHCPCONF.
Both are later used in defaultroute() to decide whether or not to configre
defaultroutes from /etc/mygate.
OK krw@

Now that route are automatically G/C with the address they are attached
to there's no reason to duplicate the kernel's job.
Fix a regression introduced with multipath default routes.
ok deraadt@

use fallback mechanims if unsuccessful.
The design of Linux getrandom is broken.  It has an
uninitialized phase coupled with blocking behaviour, which
is unacceptable from within a library at boot time without
possible recovery.
ok deraadt@ jsing@

or carp. Ensure that the noglob option is disabled at the end of
parse_hn_line() and ifstart().
Reported by Christer Solskogen and Stefan Wollny, thanks!

hostname.if(5) parsing code in ifstart().
Add a -n option to netstart to only print the interface configuration
commands instead of executing them.
Add a HN_DIR variable, that points to the directory of the hostname.if
files (default /etc) that allows for future regression tests.
- add new parse_hn_line() function
- change ifstart()
- rename $if to $_if
- don't ifconfig or ifconfig create if -n option is used
- replace hostname.if(5) parsing code with new parse_hn_line()
- just print configuration commands if -n option is used
- autoconf now happens in ifstart(), remove ifv6autoconf()
- introduce HN_DIR variable for the hostname.if file location
- add handling of the -n option to only print config commands
- ensure -n is only used if interfaces are specified as parameters
Discussed with and positive feedback from many
'commit' deraadt@
OK sthen@

size if canaries are enabled. In that case we have the exact requested
size of the allocation.  But we can at least check the given size
against the chunk size if C is not enabled. Plus add some braces
so my brain doesn't have to scan for dangling else problems when I
see this code.

to separate the open(/dev/ptm) from the ioctl(PTMGET) for privilege
separation or pledge().
Based on a diff from reyk@.
ok deraadt millert

This gives fast access to the address on systems that implement
the UserLocal register. TCB caching is still used when running
in the single-threaded mode in order not to penalize old systems.
The kernel counterpart of this change must be in place before
using this diff!
With guenther@

documentation if the first line of the file is blank.
Quirk reported by Anthony Coulter <bsd at anthonycoulter dot name>.
OK rpe@

and ok jeremy@

need to do this.

if so gcc3 should create them itself.

doesn't actually flip the switch yet, so aarch64 continues to be the only
architecture for which we build clang.
ok jsg@, deraadt@

that direclty uses /etc/ssl/{,private} by default. Adapt the httpd.conf example
accordingly.
ok florian@ benno@ millert@

without -Q during the build and in weekly(8).  According to tests
by many developers, makewhatis(8) takes a few minutes at most even
on slower hardware like octeon, loongson, ALIX, RPI3, Soekris,
cubox, softiron etc., and security(8) is often worse than makewhatis(8).
In case this causes excessive weekly(8) run times on even slower
(~50 MHz-class) CPUs, consider adding "MAKEWHATISARGS=-Q" to
/etc/weekly.local on machines that feel unhappy.
OK sthen@ kettenis@ millert@ deraadt@

okay tb@

misaligned memory accesses with armv7 ramdisk -Os bsd.rd ping
ok florian millert

version uses the two-way string matching algorithm and is faster
than the old implementation.  With this change, ports that check
for strstr having linear complexity time strstr will no longer
replace the libc strstr with a private version.
OK deraadt@ espie@

In our privsep model, imsg is often used to transport sensitive
information between processes.  But a process might free an imsg, and
reuse the memory for a different thing.  iked uses some
explicit_bzero() to clean imsg-buffer but doing it in the library with
the freezero() is less error-prone and also benefits other daemons.
OK deraadt@ jsing@ claudio@

no longer has access to the content of a memmory object. It does
this by either clearing (if the object memory remains cached) or
by calling munmap(2). ok millert@, deraadt@, guenther@

variables are not named like commands.
- change test from [] to [[]]
OK tb@ halex@

install.sub which makes it easier to spot changes in the future.
- comments and formatting
- quotes on assignments are not needed (netstart)
- remove stray space in test (netstart)
- use $file variable with while-loop (netstart)
- although valid, instead of i use $i in arithmetic test (install.sub)
OK krw@, tb@
Looks good deraadt@