New config option - disable height hint cache queries

typo broke test


leftover junk


Fix to comply with linter 

and also, D'oh conditional

chainntnfs/interface_test.go

@@ -1911,7 +1911,10 @@ func TestInterfaces(t *testing.T) {
 		if err != nil {
 			t.Fatalf("unable to create db: %v", err)
 		}
-		hintCache, err := chainntnfs.NewHeightHintCache(db)
+		testCfg := chainntnfs.Config{
+			HeightHintCacheQueryDisable: false,
+		}
+		hintCache, err := chainntnfs.NewHeightHintCache(testCfg, db)
 		if err != nil {
 			t.Fatalf("unable to create height hint cache: %v", err)
 		}