Add more things to the 1.2.3 changelog

(cherry picked from commit e8a0c1c)

Author: davidsansome

Changelog

@@ -1,7 +1,9 @@
 Version 1.2.3:
   Bugfixes:
-    * (Linux) Fix poor search performance with sqlite 3.8
-    * Fix compilation with GCC 4.9
+    * Fix compilation with GCC 4.9.
+    * (Linux) Fix poor search performance with sqlite 3.8.
+    * (Ubuntu) Fix dependency issues on Ubuntu 14.04.
+    * (Windows) Upgrade to OpenSSL 1.0.1g to fix CVE-2014-0160.