Usage:
        ...selected_raws.php?area=name&ids=id_list&cats=cat_list&day=DD&month=MM&year=YYYY

        area (optional) = name put in header of text message (default:  "SELECTED RAWS STATIONS")
         ids (required) = a comma-separated list of RAWS stations by WIMS id # (see: http://nfdrs.smkmgt.com/nfdrs_indices.txt)
        cats (optional) = a comma-separated list of WIMS climate/fuel identifiers (default:  "all")

        the following parameters are optional and can be omitted, if you only want the latest data:
                     DD = day to retreive
                     MM = month to retreive
                   yyyy = year to retreive

        example URLs (from complext to simple):

        http://nfdrs.smkmgt.com/scripts/selected_raws.php?area=OREGON&ids=350113,350208,350505&cats=7G2P3,7K2P3&day=05&month=05&year=2020
        http://nfdrs.smkmgt.com/scripts/selected_raws.php?area=OREGON&ids=350113,350208,350505&cats=all
        http://nfdrs.smkmgt.com/scripts/selected_raws.php?ids=350113,350208,350505