Merge various CTF fixes from illumos

2942 CTF tools need to handle files which legitimately lack data
2978 ctfconvert still needs to ignore legitimately dataless files on SPARC

Illumos Revisions:	13745:6b3106b4250f
			13754:7231b684c18b

Reference:

https://www.illumos.org/issues/2942
https://www.illumos.org/issues/2978

MFC after:	3 weeks
Building upon SVN r254237, disable automated activation of alternate layouts
and add support for default underride to $loader_version, acting as a way to
name a release. Release text is not displayed for the aforementioned feature
of alternate display layout (introduced in r254237); however, for all other
layouts (incl. default), the release name is displayed at lower-right.

See version.4th(8) for additional information and/or historical details.
NOTE: Also a minor edit to version.4th(8) while we're here.
Add the ability to display the default FIB number for a process to the
ps(1) utility, e.g. "ps -O fib".

bin/ps/keyword.c:
	Add the "fib" keyword and default its column name to "FIB".

bin/ps/ps.1:
	Add "fib" as a supported keyword.

sys/compat/freebsd32/freebsd32.h:
sys/kern/kern_proc.c:
sys/sys/user.h:
	Add the default fib number for a process (p->p_fibnum)
	to the user land accessible process data of struct kinfo_proc.

Submitted by:	Oliver Fromme <olli@fromme.com>, gibbs
- Initialize freq variable so we will not end up with random value
    if there is no YAMON present
When allocating a pbuf for the cluster write, do not sleep waiting
for the available pbuf when passed vnode is backing md(4). Other i/o
directed to the same md device might already hold pbufs, and then we
could deadlock since only our progress can free a pbuf needed for
wakeup.

Obtained from:	projects/vm6
Reminded and tested by:	pho
MFC after:	1 week
Fixes for compatibility with QEMU:

- Route PCI interrupt for NIC
- Make "no mapping" warning more user-friendly: add device name and mention
    that it's IRQ mapping
- Do not overlap ICUs' IO window with PCI devices' IO windows by starting
    IO rman at offset 0x100
Fix off-by-1 error in assert.

Submitted by:	Tycho Nightingale (tycho.nightingale@pluribusnetworks.com)
Build all ZFS testing & debugging tools with -g.

These programs and everything using libzpool rely on the embedded asserts to
verify the correctness of operations.  Given that, the core dumps would be
useless without debug symbols.
Couple minor if_vmx tweaks

  - Use queue size fields from the Tx/Rx queues in various places
    instead of (currently the same values) from the softc.
  - Fix potential crash in detach if the attached failed to alloc
    queue memory.
  - Move the VMXNET3_MAX_RX_SEGS define to a better spot.
  - Tweak frame size calculation w.r.t. ETHER_ALIGN. This could be
    tweaked some more, or removed since it probably doesn't matter
    much for x86 (and the x86 class of machines this driver will
    be used on).
Fix 'make release' on older hosts: use buildworld legacy utilities.

Newer FreeBSD installs require an install(1) that supports the new flags.

This adds ${MAKEOBJDIRPREFIX}${.CURDIR}/tmp/legacy/{bin,usr/{bin,sbin}}
to the PATH while generating an mtree database for 'make release'.

Note that the problem only exists here because mm-mtree.sh generates
its own object tree to avoid mucking with the existing one, which
results in a PATH containing legacy utility dirs that are empty.
Update copyright.
Add missing newlines to Fibre Channel attributes output.
Fix a crash when reloading the configuration file.

Spotted by:	des
Create a new function to complete 802.11 mbuf transmission.

The aim of this function is to eventually be the completion entry point
for all 802.11 encapsulated mbufs.  All the wifi drivers end up doing
what is in this function so it's an easy win to turn it into a net80211
method and abstract out this code.

Ideally the drivers will all eventually be modified to queue up completed
mbufs and call this function with all the driver locks not held.
This will allow for some much more interesting software queue handling
in the future (like net80211 based A-MSDU, fast-frames, A-MPDU aggregation
and retransmission.)

Tested:

* ath(4), iwn(4)
Use the new ieee80211_tx_complete() function.
It was brought to my attention that SVN r252862 was incomplete. It needed
to also make this change, to completely deprecate WITH_BSDCONFIG.
Allow more space for interface names.

MFC after:	1 week
Make the PAM password strength checking module WARNS=2 safe.

lib/libpam/modules/pam_passwdqc/Makefile:
	Bump WARNS to 2.

contrib/pam_modules/pam_passwdqc/pam_passwdqc.c:
	Bump  _XOPEN_SOURCE and _XOPEN_VERSION from 500 to 600
	so that vsnprint() is declared.

	Use the two new union types (pam_conv_item_t and
	pam_text_item_t) to resolve strict aliasing violations
	caused by casts to comply with the pam_get_item() API taking
	a "const void **" for all item types.  Warnings are
	generated for casts that create "type puns" (pointers of
	conflicting sized types that are set to access the same
	memory location) since these pointers may be used in ways
	that violate C's strict aliasing rules.  Casts to a new
	type must be performed through a union in order to be
	compliant, and access must be performed through only one
	of the union's data types during the lifetime of the union
	instance.  Handle strict-aliasing warnings through pointer
	assignments, which drastically simplifies this change.

	Correct a CLANG "printf-like function with more arguments
	than format" error.

Submitted by:	gibbs
Sponsored by:	Spectra Logic
Add note/reminder about dialog(1) regression in HEAD/10.0-C so that we don't
forget about it in the multi-month run of things to fix prior to 10.0-R.
Formally remove WITH_BSDCONFIG build option and re-generate src.conf.5
NOTE: Should have been inline with revisions 252862 and 254958.