Merge branch 'GEFS_Sep2020_landmask_fix' into develop (PR #158)
Update rrpr.F to correctly process the land surface fields in the September 2020
GEFS files. The GEFS changes were similar to the GFS changes in July 2017 which
includes a new missing value for soil fields. The landmask in the grib file does
not match the soil fields, so a landmask is created from the soil temperature
field. Without this fix the soil temperature and moisture can be zero which
causes WRF to blow up.
If NCEP eventually fixes this problem we may need to revisit this processing.
* GEFS_Sep2020_landmask_fix:
Changes to rrpr.F for the September 2020 update to GEFS.