Kill space at eols.
Cleanup alias module handler register/unregister.

- Remove locking, since all module(9) events are running under &Giant.
- Use TAILQ for protocol handlers and fix a bug which led to
  infinite cycle. Bug found in VirtualBox [1]
- Simplify code everywhere.
- Fix documentation.

[1]  https://www.virtualbox.org/pipermail/vbox-dev/2013-November/011936.html

PR:		183792 [1]
Submitted by:	Valery Ushakov <uwe NetBSD.org> [1]
Sponsored by:	Nginx, Inc.
Harvest one no longer used constant string.

Remove another and place it into play in the
normally ifdef protected zone it would be used
int.

Noticed by:	dim
vlapic code restructuring to make it easy to support hardware-assist for APIC
emulation.

The vlapic initialization and cleanup is done via processor specific vmm_ops.
This will allow the VT-x/SVM modules to layer any hardware-assist for APIC
emulation or virtual interrupt delivery on top of the vlapic device model.

Add a parameter to 'vcpu_notify_event()' to distinguish between vlapic
interrupts versus other events (e.g. NMI). This provides an opportunity to
use hardware-assists like Posted Interrupts (VT-x) or doorbell MSR (SVM)
to deliver an interrupt to a guest without causing a VM-exit.

Get rid of lapic_pending_intr() and lapic_intr_accepted() and use the
vlapic_xxx() counterparts directly.

Associate an 'Apic Page' with each vcpu and reference it from the 'vlapic'.
The 'Apic Page' is intended to be referenced from the Intel VMCS as the
'virtual APIC page' or from the AMD VMCB as the 'vAPIC backing page'.
It'll be okay to use LibAliasDetachHandlers() here, relying
on the fact that all handlers come from modules' bss and are
followed by NODIR handler.
Delay copying of resolv.conf into the chroot until /etc exists.

With an unpopulated chroot dir, release building was failing because
the script was attempting to copy resolv.conf into a non-existent /etc
directory of the chroot.  Fix this by copying the file only after the
installworld has happened, which will create this directory.

Reviewed by:	gjb
Approved by:	rpaulo (mentor)
In sys/dev/mwl/if_mwl.c, put the static RD4() function under #ifdef
MWL_DEBUG guards, since it only used in DPRINTF statements.

MFC after:	3 days
Do not truncate the ``command'' column in ``ps'' output.

Reviewed by:	jhb
MFC after:	1 week
The compile time constant limit on number of swap devices was removed in 5.2.
As such, remove the EINVAL error saying so.  Currently the vm.nswapdev sysctl
just represents the number of added swap devices.

MFC after:	1 week
gcc: small enhancements for the arm support.

Very small updates: fixes GCC-PR target/31152

Tested by building the cross-compiler.

Obtained from:	gcc 4.3 (rev. r118461, 125973: GPLv2)
MFC after:	2 weeks
sh: Simplify code related to PPID variable.
In sys/kern/sched_ule.c, remove static function sched_both(), which is
unused since r232207.

MFC after:	3 days
In sys/kern/subr_witness.c, remove static function
witness_lock_order_key_empty(), which is unused since r181695.

MFC after:	3 days
Slightly simplify expiration logic introduced in r254337.

 - Do not update the histogram for items we are any way deleting from cache.
 - Do not update the histogram if nfsrc_tcphighwater is not set.
 - Remove some extra math operations.
For vmcore, calculate time relative to device creation upon time_uptime.
Previously it used a clock from live kernel.

MFC after:	2 weeks
Clean up manual pages after BIND removal.

MFC after:	1 week
In sys/dev/sym/sym_hipd.c, remove static functions sym_que_first(),
sym_que_last() and sym_remque_tail(), which are all unused since r53790.

MFC after:	3 days
Put the release objdir inside the chroot.

When building the system from outside the chroot as part of the release
process, ensure the objdir is within the chroot so that the whole output
of the release.sh script is self-contained in a single directory.

Use CHROOTDIR/tmp/obj instead of CHROOTDIR/usr/obj to minimize possible
interferences with the output of the build itself.

Reviewed by:	gjb
Approved by:	rpaulo (mentor)
Use statndard (syscons) way to disable bell.

Testesd by:	markj

Sponsored by:	The FreeBSD Foundation
Fix a typo.