Fixed up ChangeLog with missing bug fixes

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index e9aa027..b094157 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,11 @@
    * Potential memory leak in bignum_selftest()
    * Replaced expired test certificate
    * ssl_mail_client now terminates lines with CRLF, instead of LF
+   * net module handles timeouts on blocking sockets better (found by Tilman
+     Sauerbeck)
+   * Missing MPI_CHK calls added around unguarded mpi calls (found by
+     TrustInSoft)
+   * Assembly format fixes in bn_mul.h
 
 = PolarSSL 1.3.3 released on 2013-12-31
 Features