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<article xmlns="http://docbook.org/ns/docbook"
  xmlns:xlink="http://www.w3.org/1999/xlink"
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  version="5.0">

  <info>
    <title>&os; &release.current; Release Notes</title>

    <author>
      <orgname>The &os; Project</orgname>
    </author>

    <pubdate>$FreeBSD$</pubdate>

    <copyright>
      <year>2020</year>
      <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
	Project</holder>
    </copyright>

    <legalnotice xml:id="trademarks" role="trademarks">
      &tm-attrib.freebsd;
      &tm-attrib.ibm;
      &tm-attrib.ieee;
      &tm-attrib.intel;
      &tm-attrib.sparc;
      &tm-attrib.general;
    </legalnotice>

    <abstract>
      <para>The release notes for &os; &release.current; contain
	a summary of the changes made to the &os; base system on the
	&release.branch; development line.  This document lists
	applicable security advisories that were issued since the last
	release, as well as significant changes to the &os; kernel and
	userland.  Some brief remarks on upgrading are also
	presented.</para>
    </abstract>
  </info>

  <sect1 xml:id="intro">
    <title>Introduction</title>

    <para>This document contains the release notes for &os;
      &release.current;.  It describes recently added, changed, or
      deleted features of &os;.  It also provides some notes on
      upgrading from previous versions of &os;.</para>

    <para releasetype="current">The &release.type; distribution to
      which these release notes apply represents the latest point
      along the &release.branch; development branch since
      &release.branch; was created.  Information regarding pre-built,
      binary &release.type; distributions along this branch can be
      found at <uri
	xlink:href="&release.url;">&release.url;</uri>.</para>

    <para releasetype="snapshot">The &release.type; distribution to
      which these release notes apply represents a point along the
      &release.branch; development branch between &release.prev; and
      the future &release.next;.  Information regarding pre-built,
      binary &release.type; distributions along this branch can be
      found at <uri
	xlink:href="&release.url;">&release.url;</uri>.</para>

    <para releasetype="release">This distribution of &os;
      &release.current; is a &release.type; distribution.  It can be
      found at <uri xlink:href="&release.url;">&release.url;</uri> or
      any of its mirrors.  More information on obtaining this (or
      other) &release.type; distributions of &os; can be found in the
      <link
	xlink:href="&url.books.handbook;/mirrors.html"><quote>Obtaining
	  &os;</quote> appendix</link> to the <link
	xlink:href="&url.books.handbook;/">&os;
	Handbook</link>.</para>

    <para>All users are encouraged to consult the release errata
      before installing &os;.  The errata document is updated with
      <quote>late-breaking</quote> information discovered late in the
      release cycle or after the release.  Typically, it contains
      information on known bugs, security advisories, and corrections
      to documentation.  An up-to-date copy of the errata for &os;
      &release.current; can be found on the &os; Web site.</para>

    <para>This document describes the most user-visible new or changed
      features in &os; since &release.prev;.  In general, changes
      described here are unique to the &release.branch; branch unless
      specifically marked as &merged; features.</para>

    <para>Typical release note items document recent security
      advisories issued after &release.prev;, new drivers or hardware
      support, new commands or options, major bug fixes, or
      contributed software upgrades.  They may also list changes to
      major ports/packages or release engineering practices.  Clearly
      the release notes cannot list every single change made to &os;
      between releases; this document focuses primarily on security
      advisories, user-visible changes, and major architectural
      improvements.</para>
  </sect1>

  <sect1 xml:id="upgrade">
    <title>Upgrading from Previous Releases of &os;</title>

    <para arch="amd64,i386">Binary upgrades between RELEASE versions
      (and snapshots of the various security branches) are supported
      using the &man.freebsd-update.8; utility.  The binary upgrade
      procedure will update unmodified userland utilities, as well as
      unmodified GENERIC kernels distributed as a part of an official
      &os; release.  The &man.freebsd-update.8; utility requires that
      the host being upgraded have Internet connectivity.</para>

    <para>Source-based upgrades (those based on recompiling the &os;
      base system from source code) from previous versions are
      supported, according to the instructions in
      <filename>/usr/src/UPDATING</filename>.</para>

    <important>
      <para>Upgrading &os; should only be attempted after backing up
	<emphasis>all</emphasis> data and configuration files.</para>
    </important>
  </sect1>

  <sect1 xml:id="security-errata">
    <title>Security and Errata</title>

    <para>This section lists the various Security Advisories and
      Errata Notices since &release.prev;.</para>

    <sect2 xml:id="security">
      <title>Security Advisories</title>

      &security;
    </sect2>

    <sect2 xml:id="errata">
      <title>Errata Notices</title>

      &errata;
    </sect2>
  </sect1>

  <sect1 xml:id="userland">
    <title>Userland</title>

    <para>This section covers changes and additions to userland
      applications, contributed software, and system utilities.</para>

    <sect2 xml:id="userland-config">
      <title>Userland Configuration Changes</title>

      <para revision="358903">The netatalk protocol has been removed
	from &man.services.5;.</para>
    </sect2>

    <sect2 xml:id="userland-programs">
      <title>Userland Application Changes</title>

      <para revision="350801" contrib="sponsor" sponsor="&ix;">The
	&man.camcontrol.8; utility has been updated to include support
	for Accessible Max Address Configuration
	(<acronym>AMA</acronym>).</para>

      <para revision="351582">The &man.camcontrol.8; utility has been
	updated to support block descriptors with the
	<literal>modepage</literal> subcommand.</para>

      <para revision="351694" contrib="sponsor"
	sponsor="&mellanox;">The &man.yp.8; subsystem has been updated
	to increase the value of <literal>YPMAXRECORD</literal> from
	1M to 16M for compatibility with &linux;.</para>

      <para revision="351843">The &man.usbconfig.8; utility has been
	updated to include the <literal>detach_kernel_driver</literal>
	command.</para>

      <para revision="351873">The &man.jot.1; utility has been updated
	to allow an endless stream of random data within the specified
	bounds.</para>

      <para revision="352758">The &man.freebsd-update.8; utility has
	been updated to include two new commands,
	<literal>updatesready</literal> and
	<literal>showconfig</literal>.</para>

      <para revision="353134">The &man.cron.8; utility has been
	updated to support two new flags in &man.crontab.5;,
	<literal>-n</literal> and <literal>-q</literal>, which
	suppress mail on successful runs and suppress logging of
	command execution, respectively.</para>

      <para revision="353759">The &man.zfs.8; utility has been updated
	to support renaming bookmarks.</para>

      <para revision="356401">The &man.usbconfig.8; utility has been
	updated to include the <literal>dump_stats</literal>
	command.</para>

      <para revision="356905">The &man.fsck.ffs.8; and &man.newfs.8;
	utilities has been updated to fix recovery information with
	sector sizes up to 64k.</para>

      <para revision="357082">The &man.certctl.8; utility has been
	added.</para>

      <para revision="357791">The &man.env.1; utility has been updated
	to include the <literal>-L</literal> and <literal>-U</literal>
	options, which are used to set the environment of the
	specified user from <filename>login.conf</filename> and
	<filename>~/.login_conf</filename>, respectively.</para>

      <para revision="359740">The &man.syslogd.8; utility has been
	updated to add property-based filters.</para>
    </sect2>

    <sect2 xml:id="userland-contrib">
      <title>Contributed Software</title>

      <para revision="351007">The &man.bzip2.1; utility has been
	updated to version 1.0.8.</para>

      <para revision="351611">The <application>WPA</application>
	utilities have been updated to version 2.9.</para>

      <para revision="354195">The &man.tcsh.1; utility has been
	updated to version 6.21.0.</para>

      <para revision="355504">The &man.less.1; utility has been
	updated to version 551.</para>

      <para revision="355604">The &man.libbsdxml.3; library has
	been updated to version 2.2.9.</para>

      <para revision="356290"><application>OpenSSL</application> has
	been update to version 1.0.2u.</para>

      <para revision="356341">The &man.pcap.3; library has been
	updated to version 1.9.1.</para>

      <para revision="356341">The &man.tcpdump.1; utility has been
	updated to version 4.9.3.</para>

      <para revision="356345">The &man.unbound.8; utility has been
	updated to version 1.9.6.</para>

      <para revision="356533">The &man.mtree.8; utility has been
	updated to include several bug fixes.</para>

      <para revision="358088">The &man.archive.3; library has been
	updated to version 3.4.2.</para>

      <para revision="358659">The &man.ntpd.8; utilities have been
	updated to version 4.2.8p14.</para>

      <para revision="360362">The timezone database files have been
	updated to version 2020a.</para>

      <para revision="360521">The &man.file.1; utility has been
	updated to version 5.38.</para>

      <para revision="360523">The &man.xz.1; utility has been updated
	to version 5.2.5.</para>

      <para revision="360822">The <application>clang</application>,
	<application>llvm</application>,
	<application>lld</application>,
	<application>lldb</application>,
	<application>libunwind</application>,
	<application>openmp</application>,
	<application>compiler-rt</application> utilities and
	<application>libc++</application> have been updated to version
	10.0.0.</para>

      <para revision="361217">A fix to correctly link DTrace-enabled
	ports with <application>lld</application> has been
	added.</para>
    </sect2>

    <sect2 xml:id="userland-installer">
      <title>Installation and Configuration Tools</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="userland-rc">
      <title><filename class="directory">/etc/rc.d</filename>
	Scripts</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="userland-periodic">
      <title><filename class="directory">/etc/periodic</filename>
	Scripts</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="userland-libraries">
      <title>Runtime Libraries and API</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="userland-abi">
      <title>ABI Compatibility</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="userland-debug">
      <title>Userland Debugging</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="kernel">
    <title>Kernel</title>

    <para>This section covers changes to kernel configurations, system
      tuning, and system control parameters that are not otherwise
      categorized.</para>

    <sect2 xml:id="kernel-general">
      <title>General Kernel Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="kernel-bugfix">
      <title>Kernel Bug Fixes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="kernel-config">
      <title>Kernel Configuration</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="kernel-modules">
      <title>Kernel Modules</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="kernel-sysctl">
      <title>System Tuning and Controls</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="drivers">
    <title>Devices and Drivers</title>

    <para>This section covers changes and additions to devices and
      device drivers since &release.prev;.</para>

    <sect2 xml:id="drivers-device">
      <title>Device Drivers</title>

      <para revision="351243">The <application>Kerberos</application>
	<acronym>GSS</acronym> <acronym>API</acronym> has been updated
	to emit deprecation warnings for algorithms marked as
	&quot;SHOULD NOT&quot; be used in RFCs 6649 and 8429.</para>

      <para revision="351246">The &man.crypto.4; driver has been
	updated to emit deprecation warnings when the ARC4, Blowfish,
	CAST128, DES, 3DES, MD5-HMAC, and Skipjack algorithms are
	used.</para>

      <para revision="361049">The &man.ubsec.4; driver has been marked
	as deprecated, and will be removed in &os;&nbsp;13.0.</para>
    </sect2>

    <sect2 xml:id="drivers-storage">
      <title>Storage Drivers</title>

      <para revision="354965">The &man.aacraid.4; driver has been
	updated to version 3.2.10.</para>

      <para revision="359971">Support for JMicron&reg; JMB582 and
	JMB585 <acronym>AHCI</acronym> controllers has been
	added.</para>
    </sect2>

    <sect2 xml:id="drivers-network">
      <title>Network Drivers</title>

      <para revision="359258">Support for the D-Link&reg; DWM-222
	<acronym>LTE</acronym> dongle has been added.</para>

      <para revision="359698">The &man.ng.nat.4; driver has been
	updated to allow attaching to an ethernet interface.</para>

      <para revision="361539" contrib="sponsor" sponsor="&amazon;">The
	&man.ena.4; driver has been updated to version
	2.2.0.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="hardware">
    <title>Hardware Support</title>

    <para>This section covers general hardware support for physical
      machines, hypervisors, and virtualization environments, as well
      as hardware changes and updates that do not otherwise fit in
      other sections of this document.</para>

    <sect2 xml:id="hardware-support">
      <title>Hardware Support</title>

      <para revision="359114">Support for &intel; Cannon Lake PCH has
	been added to &man.snd.hda.4;.</para>
    </sect2>

    <sect2 xml:id="hardware-virtualization">
      <title>Virtualization Support</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="hardware-arm">
      <title>ARM Support</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="storage">
    <title>Storage</title>

    <para>This section covers changes and additions to file systems
      and other storage subsystems, both local and networked.</para>

    <sect2 xml:id="storage-general">
      <title>General Storage</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="storage-net">
      <title>Networked Storage</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="storage-zfs">
      <title>ZFS</title>

      <para revision="353583">Latency of synchronous 128KB writes has
	been improved.</para>

      <para revision="353759">Support for renaming
	<acronym>ZFS</acronym> bookmarks has been added.</para>

      <para revision="359554">The <acronym>ZFS</acronym>
	<acronym>ZIL</acronym> (<acronym>ZFS</acronym> intent log)
	maximum block size is now tunable.</para>
    </sect2>

    <sect2 xml:id="storage-geom">
      <title><literal>geom(4)</literal></title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="boot">
    <title>Boot Loader Changes</title>

    <para>This section covers the boot loader, boot menu, and other
      boot-related changes.</para>

    <sect2 xml:id="boot-loader">
      <title>Boot Loader Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="boot-menu">
      <title>Boot Menu Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="network">
    <title>Networking</title>

    <para>This section describes changes that affect networking in
      &os;.</para>

    <sect2 xml:id="network-general">
      <title>General Network Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="network-protocols">
      <title>Network Protocols</title>

      <para revision="359695">The &man.libalias.3; library and
	&man.ipfw.4; packet filter have been updated to add support
	for <acronym>RFC</acronym> 6598/Carrier Grade
	<acronym>NAT</acronym> subnets.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="ports">
    <title>Ports Collection and Package Infrastructure</title>

    <para>This section covers changes to the &os;&nbsp;Ports
      Collection, package infrastructure, and package maintenance and
      installation tools.</para>

    <sect2 xml:id="ports-infrastructure">
      <title>Infrastructure Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="ports-packages ">
      <title>Packaging Changes</title>

      <para>The &man.pkg.8; utility has been updated to version
	1.13.2.</para>

      <para>The <application>GNOME</application> desktop environment
	has been updated to version 3.28.</para>

      <para>The <application>KDE</application> desktop environment has
	been updated to version 5.8.4.1.19.12.3.</para>
    </sect2>
  </sect1>

  <sect1 xml:id="doc">
    <title>Documentation</title>

    <para>This section covers changes to the &os;&nbsp;Documentation
      Project sources and toolchain.</para>

    <sect2 xml:id="doc-sources">
      <title>Documentation Source Changes</title>

      <para>&nbsp;</para>
    </sect2>

    <sect2 xml:id="doc-toolchain">
      <title>Documentation Toolchain Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>

  <sect1 xml:id="releng">
    <title>Release Engineering and Integration</title>

    <para>This section convers changes that are specific to the
      &os;&nbsp;Release Engineering processes.</para>

    <sect2 xml:id="releng-changes">
      <title>Integration Changes</title>

      <para>&nbsp;</para>
    </sect2>
  </sect1>
</article>