Expanded javadoc for native openPort() method

src/java/jssc/SerialNativeInterface.java

@@ -258,6 +258,10 @@ public class SerialNativeInterface {
      * Open port
      *
      * @param portName name of port for opening
+     * @param useTIOCEXCL enable/disable using of <b>TIOCEXCL</b>. Take effect only on *nix based systems.
+     * Ignored if invokedByPortList == true, and always igored on Windows
+     * @param invokedByPortList if <b>true</b> - open port only for checking handle, not for working.
+     * Take effect only on *nix based systems. If invokedByPortList == true value of <b>useTIOCEXCL</b> will be ignored
      * 
      * @return handle of opened port or -1 if opening of the port was unsuccessful
      */