Updated change log and and database configuration to include failover
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 979755c..5c7fd8d 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -97,6 +97,7 @@
       $this->db->like() in the :doc:`Database
       Driver <database/active_record>`.
    -  Added $this->db->insert_batch() support to the OCI8 (Oracle) driver.
+   -  Added failover if the main connections in the config should fail
 
 -  Libraries