Add new Makefile knob, USE_FORT, which extends USE_SSP by turning on the
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.

This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.

This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.

Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.

Nuke gratuitous setting of BINOWN and BINGRP.

mld6query: throw IPv6 MLD query (similar to IPv4 IGMP)

Fix typo in comment.

PR/51353: Patrick Mackey: mld6query "-r" option is not recognised
XXX: pullup 7

branches: 1.14.20; 1.14.22; 1.14.24; 1.14.26;
static + __dead

Fix WARNS=4 issues (-Wshadow -Wsign-compare)

branches: 1.12.28;
change (mostly) int to socklen_t. GCC 4 doesn't like that int and
socklen_t are different signness.

usage: Add -d and -r. Use getprogname().
Reviewed by uebayasi@. This closes PR bin/26686.

- sync up MLD declaration with RFC3542 (s/MLD6/MLD/)
- routing header declaration with RFC3542
(note: sizeof(ip6_rthdr0) has changed!)
also, sync up with RFC2460 routing header definition (no "strict" source
routing mode any more)

part of advanced API update (RFC2292 -> 3542).

null commit

poll.h, not sys/poll.h

select() -> poll(), nanosleep()

die if fd_set overrun. (they're not setuid binary so it is not that critical)

sweep of errx/warnx, remove unnecessary trailing \n

getopt(3): EOF -> -1.

$KAME$ cleanup. address PR 11616 (CMSG_SPACE should be CMSG_LEN).
sync with kame.

sync with recent KAME.

mld6query: throw IPv6 MLD query (similar to IPv4 IGMP)

Use Ex.

Remove workaround for ancient HTML generation code.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Whitespace nits.

$KAME$ cleanup. address PR 11616 (CMSG_SPACE should be CMSG_LEN).
sync with kame.

fix up various .Nm abuses:
- keep the case consistent between the actual name and what's referenced.
e.g, if it's `foo', don't use '.Nm Foo' at the start of a sentence.
- remove unnecessary `.Nm foo' after the first occurrence (except for
using `.Nm ""' if there's stuff following, or for the 2nd and so on
occurrences in a SYNOPSIS
- use Sx, Ic, Li, Em, Sq, and Xr as appropriate

For commands and utilities, use EXIT STATUS rather than RETURN VALUES or
DIAGNOSTICS as appropriate (and documented in mdoc(7)).

sync with recent KAME.

mld6query: throw IPv6 MLD query (similar to IPv4 IGMP)