clarified terminology in JavaDoc
/**
* Base constructor.
*
- * @param bitLength bit length of the underlying SHAKE function, 128 or 256.
+ * @param bitLength security strength of the underlying SHAKE function, 128 or 256.
* @param N the function name string, note this is reserved for use by NIST. Avoid using it if not required.
* @param S the customization string - available for local use.
*/
