Write release notes for 4.9 (#17833)

wiki/src/news/version_4.9.mdwn

+[[!meta title="Tails 4.9 is out"]]
+[[!meta date="Tue, 28 Jul 2020 12:34:56 +0000"]]
+[[!pagetemplate template="news.tmpl"]]
+[[!tag announce]]
+
+This release fixes [[many security
+vulnerabilities|security/Numerous_security_holes_in_4.9]]. You should upgrade as soon as possible.
+
+[[!toc levels=1]]
+
+# Changes and updates
+
+- Update *Tor Browser* to [9.5.3](https://blog.torproject.org/new-release-tor-browser-953).
+
+- Update *Thunderbird* to [68.10.0](https://www.thunderbird.net/en-US/thunderbird/68.10.0/releasenotes/).
+
+- Update *Linux* to 5.7.6. This should improve the support for newer
+  hardware (graphics, Wi-Fi, etc.).
+
+# Fixed problems
+
+* Allow characters others than <span class="code">A&ndash;Z</span>,
+  <span class="code">a&ndash;z</span>, <span class="code">1&ndash;9</span>, and <span class="code">_@%+=:,./-</span> in
+  the [[administration password|doc/first_steps/welcome_screen/administration_password]].
+  ([[!tails_ticket 17792]])
+
+* Apply the keyboard layout that is automatically selected when you change
+  the language in the Welcome Screen. ([[!tails_ticket 17794]])
+
+* Fix starting Tails with the <span class="code">toram</span> boot option.
+  ([[!tails_ticket 17800]])
+
+For more details, read our [[!tails_gitweb debian/changelog desc="changelog"]].
+
+<a id="known-issues"></a>
+
+# Known issues
+
+<!--
+
+Copy the known issues from the previous version if they haven't been
+solved or move them to /support/known_issues if more appropriate.
+
+-->
+
+None specific to this release.
+
+See the list of [[long-standing issues|support/known_issues]].
+
+# Get Tails 4.9
+
+## To upgrade your Tails USB stick and keep your persistent storage
+
+- Automatic upgrades are available from Tails 4.2 or later to 4.9.
+
+- If you cannot do an automatic upgrade or if Tails fails to start after an
+  automatic upgrade, please try to do a [[manual upgrade|doc/upgrade/#manual]].
+
+## To install Tails on a new USB stick
+
+Follow our installation instructions:
+
+  - [[Install from Windows|install/win]]
+  - [[Install from macOS|install/mac]]
+  - [[Install from Linux|install/linux]]
+
+<div class="caution"><p>The Persistent Storage on the USB stick will be lost if
+you install instead of upgrading.</p></div>
+
+## To download only
+
+If you don't need installation or upgrade instructions, you can download
+Tails 4.9 directly:
+
+  - [[For USB sticks (USB image)|install/download]]
+  - [[For DVDs and virtual machines (ISO image)|install/download-iso]]
+
+# What's coming up?
+
+Tails 4.10 is [[scheduled|contribute/calendar]] for August 25.
+
+Have a look at our [[!tails_roadmap]] to see where we are heading to.
+
+We need your help and there are many ways to [[contribute to
+Tails|contribute]] (<a href="https://tails.boum.org/donate/?r=4.9">donating</a> is only one of
+them). Come [[talk to us|about/contact#tails-dev]]!