Merge pull request #2068 from stefoss23/add_keywords_M

added keywords beginnign w/ M.

opm/simulators/flow/MissingFeatures.cpp

@@ -405,7 +405,13 @@ namespace MissingFeatures {
             "MAPUNITS",
             "MATCORR",
             "MAXVALUE",
+            "MESSOPTS",
+            "MESSSRVC",
+            "MINNNCT",
+            "MINPORV",
             "MINVALUE",
+            "MLANG",
+            "MLANGSLV",
             "MONITOR",
             "MSGFILE",
             "MULT_XYZ",