Numeric index of land use/land cover types, if overlapped with protected areas (100)

[vwvbrand]

Land cover types overlapped with protected areas are currently mapped as 100 + $lulc_type (hardcoded). In case if initial LULC classification contains over 100 types, this will overwrite some of the values of LULC types.
There are two solutions:
-use 1000 instead of 100
-use placeholder for the numeric prefix of protected LULC types, which would be called from the configuration file. However this will bloat the configuration file with another parameter. It might be counterintuitive for user to have a long configuration file.