Add undoc'ed options for pgpointcloud writer
Add undoc'ed options for pgpointcloud writer

boundlessgeo/PDAL,boundlessgeo/PDAL,mtCarto/PDAL,mpgerlek/PDAL-old,DougFirErickson/PDAL,radiantbluetechnologies/PDAL,radiantbluetechnologies/PDAL,lucadelu/PDAL,mtCarto/PDAL,lucadelu/PDAL,Sciumo/PDAL,radiantbluetechnologies/PDAL,DougFirErickson/PDAL,jwomeara/PDAL,jwomeara/PDAL,mtCarto/PDAL,jwomeara/PDAL,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,mtCarto/PDAL,mpgerlek/PDAL-old,boundlessgeo/PDAL,lucadelu/PDAL,DougFirErickson/PDAL,Sciumo/PDAL,jwomeara/PDAL,Sciumo/PDAL,lucadelu/PDAL,boundlessgeo/PDAL,DougFirErickson/PDAL,mpgerlek/PDAL-old,Sciumo/PDAL