Add the new DO and NOTHING keywords to the keyword lists maintained
by various extensions and auxiliary programs.

FossilOrigin-Name: 77a98a0781cd8450e2100111e70526db6a51d7e58e3c505ea87f685388099e82
diff --git a/tool/sqldiff.c b/tool/sqldiff.c
index b31489b..44f05e7 100644
--- a/tool/sqldiff.c
+++ b/tool/sqldiff.c
@@ -141,12 +141,13 @@
     "CASCADE", "CASE", "CAST", "CHECK", "COLLATE", "COLUMN", "COMMIT",
     "CONFLICT", "CONSTRAINT", "CREATE", "CROSS", "CURRENT_DATE",
     "CURRENT_TIME", "CURRENT_TIMESTAMP", "DATABASE", "DEFAULT", "DEFERRABLE",
-    "DEFERRED", "DELETE", "DESC", "DETACH", "DISTINCT", "DROP", "EACH",
+    "DEFERRED", "DELETE", "DESC", "DETACH", "DISTINCT", "DO", "DROP", "EACH",
     "ELSE", "END", "ESCAPE", "EXCEPT", "EXCLUSIVE", "EXISTS", "EXPLAIN",
     "FAIL", "FOR", "FOREIGN", "FROM", "FULL", "GLOB", "GROUP", "HAVING", "IF",
     "IGNORE", "IMMEDIATE", "IN", "INDEX", "INDEXED", "INITIALLY", "INNER",
     "INSERT", "INSTEAD", "INTERSECT", "INTO", "IS", "ISNULL", "JOIN", "KEY",
-    "LEFT", "LIKE", "LIMIT", "MATCH", "NATURAL", "NO", "NOT", "NOTNULL",
+    "LEFT", "LIKE", "LIMIT",
+    "MATCH", "NATURAL", "NO", "NOT", "NOTHING", "NOTNULL",
     "NULL", "OF", "OFFSET", "ON", "OR", "ORDER", "OUTER", "PLAN", "PRAGMA",
     "PRIMARY", "QUERY", "RAISE", "RECURSIVE", "REFERENCES", "REGEXP",
     "REINDEX", "RELEASE", "RENAME", "REPLACE", "RESTRICT", "RIGHT",