Add padding packet tag
public static final int USER_ATTRIBUTE = 17; // User attribute
public static final int SYM_ENC_INTEGRITY_PRO = 18; // Symmetric encrypted, integrity protected
public static final int MOD_DETECTION_CODE = 19; // Modification detection code
+ public static final int PADDING = 21; // Padding Packet
public static final int EXPERIMENTAL_1 = 60; // Private or Experimental Values
public static final int EXPERIMENTAL_2 = 61;
