Amended ChangeLog for client authentication fix

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 4e9f6c2..d84a2a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,9 @@
    * Added p_hw_data to ssl_context for context specific hardware acceleration
      data
 
+Bugfixes
+   * Fixed client authentication compatibility with TLS 1.2
+
 = Version 1.2.1 released 2012-11-20
 Changes
    * Depth that the certificate verify callback receives is now numbered