add short descriptions for t3doc

    group externalfunctions {

    group externalfunctions {

        // Return random charstring

        /**

         * @desc External function to return random charstring

         */

        external function fx_rndStr(

        external function fx_rndStr(

        ) return charstring;

        ) return charstring;

        // Return the equivalent string in lower case

        /**

         * @desc External function to return the equivalent string in lower case

         */

        external function fx_putInLowercase(

        external function fx_putInLowercase(

            charstring p_string

            charstring p_string

        ) return charstring;

        ) return charstring;

        /**

         * @desc External function to get IP address.

         */

        external function fx_getIpAddr(

        external function fx_getIpAddr(

            charstring p_host_name

            charstring p_host_name

        ) return charstring;

        ) return charstring;