db_cassandra: updated documentation

- added URLs for Thrift library and Cassandra

modules/db_cassandra/README

@@ -142,9 +142,12 @@ default_validation_class='UTF8Type' and key_validation_class='UTF8Type';
 
    The following libraries or applications must be installed before
    running SIP Router with this module loaded:
-     * Thrift library version 0.6.1 .
+     * Thrift library (tested with version 0.6.1 and version 0.7.0). You
+       can download it from http://archive.apache.org/dist/thrift .
 
-   The implementation was tested with Cassandra version 1.0.1 .
+   The implementation was tested with Cassandra version 1.0.1 and version
+   1.1.6. I used the sourced from DataStax Community Edition
+   (http://www.datastax.com/download/community).
 
 3. Parameters
 

modules/db_cassandra/doc/db_cassandra_admin.xml

@@ -122,12 +122,17 @@ default_validation_class='UTF8Type' and key_validation_class='UTF8Type';
 			<itemizedlist>
 			<listitem>
 			<para>
-				<emphasis>Thrift library</emphasis> version 0.6.1 .
+				<emphasis>Thrift library</emphasis>
+				(tested with version 0.6.1 and version 0.7.0).
+				You can download it from http://archive.apache.org/dist/thrift .
 			</para>
 			</listitem>
 			</itemizedlist>
 		</para>
-		<para> The implementation was tested with Cassandra version 1.0.1 .</para>
+		<para> The implementation was tested with Cassandra version 1.0.1
+			and version 1.1.6. I used the sourced from DataStax Community
+			Edition (http://www.datastax.com/download/community).
+		</para>
 	</section>
 	</section>