Add missing stuff to the changelog.

debian/changelog

 tails (0.23~rc1) unstable; urgency=medium
 
-  * Security fixes
-
   * Major new features
     - Spoof the network interfaces' MAC address by default (Closes: #5421),
       as designed on https://tails.boum.org/contribute/design/MAC_address/.
@@ -45,8 +43,12 @@ tails (0.23~rc1) unstable; urgency=medium
       · Drop the Tails Upgrader launcher, to limit users' confusion
         (Closes: #6513).
       · Lock down sudo credentials a bit.
+      · Hide debugging information (Closes: #6505).
       · Include ~/.xsession-errors in WhisperBack bug reports.
         This captures the Tails Upgrader errors and debugging information.
+      · Report more precisely why an incremental upgrade cannot be done
+        (Closes: #6575).
+      · Various user interface and phrasing improvements.
     - Don't install the Cookie Monster browser extension (Closes: #6790).
     - Add a browser bookmark pointing to Tor's Stack Exchange (Closes: #6632).
     - Remove the preconfigured #tor channel from the Pidgin: apparently,
@@ -56,6 +58,12 @@ tails (0.23~rc1) unstable; urgency=medium
     - Use (most of) Tor Browser's mozconfig (Closes: #6474).
     - Rebase the browser on top of iceweasel 24.3.0esr-1, to get
       the certificate authorities added by Debian back (Closes: #6704).
+    - Give access to the relevant documentation pages from Tails Greeter.
+    - Hide Tails Greeter's password mismatch warning when entry is changed.
+    - Persistent Volume Assistant:
+      · Take into account our installer is now called Tails Installer.
+      · Optimize window height (Closes: #5458).
+      · Display device paths in a more user-friendly way (Closes: #5311).
 
   * Build system
     - Ease updating POT and PO files at release time, and importing translations