avoid using 10MiB EC buffers in maxAPI calculations (#19665)

max requests per node is more conservative in its value
causing premature serialization of the calls, avoid it
for newer deployments.

cmd/erasure-server-pool.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2021 MinIO, Inc.
+// Copyright (c) 2015-2024 MinIO, Inc.
 //
 // This file is part of MinIO Object Storage stack
 //
@@ -644,6 +644,15 @@ func (z *erasureServerPools) Shutdown(ctx context.Context) error {
 	return nil
 }
 
+// Legacy returns 'true' if distribution algo is CRCMOD
+func (z *erasureServerPools) Legacy() (ok bool) {
+	ok = true
+	for _, set := range z.serverPools {
+		ok = ok && set.Legacy()
+	}
+	return ok
+}
+
 func (z *erasureServerPools) BackendInfo() (b madmin.BackendInfo) {
 	b.Type = madmin.Erasure