chore: revise the comment of standard transport's readBufferSize (#1362)

Author: ppzqh

pkg/app/server/option.go

@@ -278,7 +278,8 @@ func WithH2C(enable bool) config.Option {
 	}}
 }
 
-// WithReadBufferSize sets the read buffer size which also limit the header size.
+// WithReadBufferSize sets the size of each read buffer node in standard transport.
+// NOTE: this cannot limit the header size.
 func WithReadBufferSize(size int) config.Option {
 	return config.Option{F: func(o *config.Options) {
 		o.ReadBufferSize = size

pkg/network/standard/transport.go

@@ -31,13 +31,8 @@ import (
 )
 
 type transport struct {
-	// Per-connection buffer size for requests' reading.
-	// This also limits the maximum header size.
-	//
-	// Increase this buffer if your clients send multi-KB RequestURIs
-	// and/or multi-KB headers (for example, BIG cookies).
-	//
-	// Default buffer size is used if not set.
+	// The underlying read buffer is a buffer node list, `readBufferSize` is the size of a single node.
+	// `defaultReadBufferSize` (4KB) is used if not set.
 	readBufferSize           int
 	network                  string
 	addr                     string