pmacUtil: refactor of PLC4, and added new Safety Check bitmask to allow external P variables to disable axes
pmacUtil: refactor of PLC4, and added new Safety Check bitmask to allow external P variables to disable axes

dls-controls/pmacUtil,dls-controls/pmacUtil,dls-controls/pmacUtil,dls-controls/pmacUtil,dls-controls/pmacUtil