Update changelog for 3.6.

debian/changelog

 tails (3.6) UNRELEASED; urgency=medium
 
-  * Dummy entry for next release.
-
- -- Tails developers <tails@boum.org>  Mon, 05 Mar 2018 13:56:13 +0100
-
-tails (3.6~rc1) unstable; urgency=medium
-
   * Major changes
+    - Upgrade Tor Browser to 7.5.1.
     - Upgrade Tor to 0.3.2.9. (Closes: #15158)
     - Add ability to lock the screen. (Closes: #5684)
     - Add initial support for Meek bridges. (Closes: #8243)
@@ -15,18 +10,23 @@ tails (3.6~rc1) unstable; urgency=medium
     - Upgrade Linux to 4.15.0-1. (Closes: #15309).
     - Upgrade systemd to 237.
     - Upgrade Electrum to 3.0.6. (Closes: #15022)
+    - Upgrade the base system to the Debian Stretch 9.4 point-release
+      (Closes: #15341)
     - Port a few shell scripts to Python thanks to GoodCrypto. (Closes: #11198)
 
   * Security fixes
     - Upgrade Intel processor microcode firmware. (Closes: #15173).
     - Upgrade poppler to 0.48.0-2+deb9u1. (CVE-2017-14929, CVE-2017-1000456)
-    - Upgrade tiff to 4.0.8-2+deb9u2 ( CVE-2017-9935, CVE-2017-11335,
+    - Upgrade tiff to 4.0.8-2+deb9u2 (CVE-2017-9935, CVE-2017-11335,
       CVE-2017-12944, CVE-2017-13726, CVE-2017-13727, CVE-2017-18013)
     - Upgrade ffmpeg to 7:3.2.10-1~deb9u1. (CVE-2017-17081)
     - Upgrade libtasn1-6 to 4.10-1.1+deb9u1. (CVE-2017-10790, CVE-2018-6003)
     - Upgrade Libre Office to 1:5.2.7-1+deb9u2. (CVE-2018-6871)
-    - Upgrade libvorbis to 1.3.5-4+deb9u1. (CVE-2017-14632, CVE-2017-14633
+    - Upgrade libvorbis to 1.3.5-4+deb9u1. (CVE-2017-14632, CVE-2017-14633)
     - Upgrade gcc to 6.3.0-18+deb9u1.
+    - Upgrade util-linux to 2.29.2-1+deb9u1. (CVE-2018-7738)
+    - Upgrade isc-dhcp to 4.3.5-3+deb9u1 (CVE-2017-3144, CVE-2018-5732,
+      CVE-2018-5733)
 
   * Minor improvements
     - Avoid noisy warning at boot time by creating tails-upgrade-frontend's
@@ -89,7 +89,7 @@ tails (3.6~rc1) unstable; urgency=medium
     - Add additional software packages feature. (Closes: #14572)
     - Disable test that is broken due to a Tor Browser bug. (Closes: #15336)
 
- -- Tails developers <tails@boum.org>  Fri, 02 Mar 2018 03:38:03 +0100
+ -- Tails developers <tails@boum.org>  Mon, 12 Mar 2018 19:33:27 +0100
 
 tails (3.5) unstable; urgency=medium