98_ModbusAttr.pm: updated documentation for new features of the base module 98_Modbus.pm
98_ModbusAttr.pm: updated documentation for new features of the base module 98_Modbus.pmView Changes
Source: 98_ModbusAttr.pm: updated documentation for new features of the base module 98_Modbus.pm (https://sourceforge.net/p/fhem/code/11817/)