Update the announce, security advisory and changelog wrt. the browser and Pidgin upgrades.

debian/changelog

 tails (0.22.1) unstable; urgency=medium
 
   * Security fixes
-    - Update NSS to 3.14.5-1~bpo60+1.
+    - Upgrade the web browser to 24.3.0esr-0+tails1~bpo60+2
+      (Firefox 24.3.0esr + Iceweasel patches + Torbrowser patches).
+    - Upgrade NSS to 3.14.5-1~bpo60+1.
+    - Upgrade Pidgin to 2.10.8.
     - Workaround browser size fingerprinting issue by using small icons
       in the web browser's navigation toolbar (Closes: #6377).
       We're actually hit by Tor#9268, and this is the best workaround gk

wiki/src/news/version_0.22.1.mdwn

@@ -14,12 +14,14 @@ All users must upgrade as soon as possible: this release fixes
 Notable user-visible changes include:
 
 * Security fixes
-  - Upgrade Iceweasel to 24.3.0esr, that fixes a few serious
+  - Upgrade the web browser to 24.3.0esr, that fixes a few serious
     security issues.
   - Upgrade the system NSS to 3.14.5, that fixes a few serious
     security issues.
   - Workaround a browser size fingerprinting issue by using small
     icons in the web browser's navigation toolbar.
+  - Upgrade Pidgin to 2.10.8, that fixes a number of serious
+    security issues.
 
 * Major improvements
   - Check for upgrades availability using Tails Upgrader, and propose

wiki/src/security/Numerous_security_holes_in_0.22.mdwn

@@ -25,3 +25,6 @@ Details
  - GnuPG: [[!debsa2014 2821]]
  - hplip: [[!debsa2014 2829]]
  - libtar: [[!debsa2014 2817]]
+ - Pidgin: [[!cve 2013-6477]], [[!cve 2013-6478]], [[!cve 2013-6479]],
+   [[!cve 2013-6483]], [[!cve 2013-6484]], [[!cve 2013-6486]],
+   [[!cve 2014-0020]], [[!cve 2014-6485]]