Update bld/dig/h/mados.h and all dependents

OS_WINDOWS and OS_NT definitions from bld/dig/h/mados.h ostypes enum also defined in bld\w32api\nt\shlwapi.h with a different values.
For conflict name resolutions I propose to rename ostypes enum elements by adding "MAD_"  prefix (as in the last one element MAD_OS_MAX).