add helper methods to disable crc calculation

src/fsfw/tmtcservices/CommandingServiceBase.h

@@ -25,12 +25,16 @@ void setStaticFrameworkObjectIds();
  * 			relay Telecommands to software bus.
  *
  * It manages Telecommand reception and the generation of Verification Reports
- * similar to PusServiceBase. This class is used if a telecommand can't be
+ * similar to @PusServiceBase. This class is used if a telecommand can't be
  * handled immediately and must be relayed to the internal software bus.
  *   - isValidSubservice
  *   - getMessageQueueAndObject
  *   - prepareCommand
  *   - handleReply
+ *
+ * Please note that the TM packets generated by this class will not have a valid CRC. It is
+ * generally assumed that all packets will pass through a layer where the sequence count is set
+ * and the CRC16 needs to be re-calculated anyway.
  * @author gaisser
  * @ingroup pus_services
  */