Merge pull request #37688 from tiborvass/features-not-flat

Fix logic when enabling buildkit
diff --git a/api/server/router/build/build_routes.go b/api/server/router/build/build_routes.go
index acacfac..c2a15c0 100644
--- a/api/server/router/build/build_routes.go
+++ b/api/server/router/build/build_routes.go
@@ -231,7 +231,7 @@
 	}
 
 	// check if the builder feature has been enabled from daemon as well.
-	if buildOptions.Version == types.BuilderBuildKit && br.builderVersion != types.BuilderBuildKit {
+	if buildOptions.Version == types.BuilderBuildKit && br.builderVersion != "" && br.builderVersion != types.BuilderBuildKit {
 		return errdefs.InvalidParameter(errors.New("buildkit is not enabled on daemon"))
 	}
 
diff --git a/daemon/config/config.go b/daemon/config/config.go
index 6081b5c..451078d 100644
--- a/daemon/config/config.go
+++ b/daemon/config/config.go
@@ -54,6 +54,7 @@
 	"log-opts":           true,
 	"runtimes":           true,
 	"default-ulimits":    true,
+	"features":           true,
 }
 
 // skipValidateOptions contains configuration keys