Fix multiple vulnerabilities of ntp.

Approved by: so

Fix multiple ntp vulnerabilities.

Security: FreeBSD-SA-16:24.ntp
Approved by: so

Fix ntp multiple vulnerabilities.

Approved by: so

Fix BIND remote denial of service vulnerability. [SA-16:08]

Fix multiple vulnerabilities of ntp. [SA-16:09]

Fix Linux compatibility layer issetugid(2) system call
vulnerability. [SA-16:10]

Security: FreeBSD-SA-16:08.bind
Security: FreeBSD-SA-16:09.ntp
Security: FreeBSD-SA-16:10.linux
Approved by: so

o Fix invalid TCP checksums with pf(4). [EN-16:02.pf]
o Fix YP/NIS client library critical bug. [EN-16:03.yplib]
o Fix SCTP ICMPv6 error message vulnerability. [SA-16:01.sctp]
o Fix ntp panic threshold bypass vulnerability. [SA-16:02.ntp]
o Fix Linux compatibility layer incorrect futex handling. [SA-16:03.linux]
o Fix Linux compatibility layer setgroups(2) system call. [SA-16:04.linux]
o Fix TCP MD5 signature denial of service. [SA-16:05.tcp]
o Fix insecure default bsnmpd.conf permissions. [SA-16:06.bsnmpd]

Errata: FreeBSD-EN-16:02.pf
Errata: FreeBSD-EN-16:03.yplib
Security: FreeBSD-SA-16:01.sctp, CVE-2016-1879
Security: FreeBSD-SA-16:02.ntp, CVE-2015-5300
Security: FreeBSD-SA-16:03.linux, CVE-2016-1880
Security: FreeBSD-SA-16:04.linux, CVE-2016-1881
Security: FreeBSD-SA-16:05.tcp, CVE-2016-1882
Security: FreeBSD-SA-16:06.bsnmpd, CVE-2015-5677
Approved by: so

Upgrade NTP to 4.2.8p4.

Security: FreeBSD-SA-15:25.ntp
Security: CVE-2015-7871
Security: CVE-2015-7855
Security: CVE-2015-7854
Security: CVE-2015-7853
Security: CVE-2015-7852
Security: CVE-2015-7851
Security: CVE-2015-7850
Security: CVE-2015-7849
Security: CVE-2015-7848
Security: CVE-2015-7701
Security: CVE-2015-7703
Security: CVE-2015-7704, CVE-2015-7705
Security: CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
Approved by: so

Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r235337:

General mdoc(7) and typo fixes.

PR: 167804

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Fix some duplicate-word typos in manpages.

Submitted by: arundel
MFC after: 1 week

Fix typos and spelling mistakes.

Fix typo.

Correct the description of minpoll and maxpoll.

Note that while later versions of the ntpd documentation use the term
"dual logarithm", the text added here is consistent with the remainder
of the current document.

PR: docs/106926
Submitted by: Jeremy Chadwick

Markup fixes.

- Fix markup

PR: docs/98471
Submitted by: Tsurutani Naoki <turutani@scphys.kyoto-u.ac.jp>
MFC after: 1 day

- Update to ntp-4.2.0

PR: docs/79857
Submitted by: Tsurutani Naoki <turutani@scphys.kyoto-u.ac.jp>

Document that /etc/rc.d/ntpdate will read this file to find out a list
of NTP hosts, if ntpdate_hosts is unset or empty.

PR: conf/79712
Submitted by: Tsurutani Naoki <turutani@scphys.kyoto-u.ac.jp>
mdoc text by: Matteo Riondato <rionda@gufi.org>

Expand *n't contractions.

Eliminated double whitespace.

Mechanically kill hard sentence breaks.

Add missing spaces after "logconfig" in example lines.

PR: docs/64082
Submitted by: Tsurutani Naoki
MFC after: 3 days

Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.

Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/
Add FreeBSD Id tag where missing.

english(4) police.

Uniformly refer to a file system as "file system".

Approved by: re

mdoc(7) police: kill whitespace at EOL.

Approved by: re

Consistancy check: s/file system/filesystem/g

Various fixes, mostly for problems introduced by my mdoc transcription,
rather than problems that existed in the original HTML "source".

PR: docs/33585
Submitted: Norihiro Kumagai <kumagai@attbi.com>

Update the mdoc NTP documentation transcribed from the HTML documentation
for ntp-4.1.0.

Unfortunately, David Mills insists on managing the documentation in
such a way as to make it impossible for me to make things easy on our
translators, without printing out the documentation and reading through
it side-by-side with a finger on each page.

Preceed/preceeding are not english words. Use precede and preceding.

mdoc(7) police: split punctuation characters + misc fixes.

Improve some slightly confused formatting.

Reviewed by: sheldonh

Merge into the manual pages the changes from 4.0.99b:
ntpd.8:
add -gx to SYNOPSIS
clarify explanation of -g
ntp.conf.5:
add missing field description for rawstats lines

Install audio.htm, driver3[567].htm and qth.htm.

Abandon hope of keeping in line with the author's structure,
in favour of placing information in the correct sections.

The ntp_acc(8), ntp_auth(8), ntp_clock(8), ntp_conf(8),
ntp_misc(8) and ntp_mon(8) pages have been merged into
ntp.conf(5) and ntp.keys(5).

Requested by: rgrimes, wollman