Ability to specify allowed ciphersuites based on the protocol version.

The ciphersuites parameter in the ssl_session structure changed from
'int *' to 'int **' and is now malloced in ssl_init() and freed in
ssl_free().

The new function ssl_set_ciphersuite_for_version() sets specific entries
inside this array. ssl_set_ciphersuite() sets all entries to the same
value.
diff --git a/ChangeLog b/ChangeLog
index 18be08a..e007de4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,9 @@
 PolarSSL ChangeLog
 
 = Branch 1.2
+Features
+   * Ability to specify allowed ciphersuites based on the protocol version.
+
 Bugfix
    * Fix for MPI assembly for ARM