Add "in bytes" to sizes in documentation

client.go

@@ -70,7 +70,7 @@ type Dialer struct {
 	// HandshakeTimeout specifies the duration for the handshake to complete.
 	HandshakeTimeout time.Duration
 
-	// ReadBufferSize and WriteBufferSize specify I/O buffer sizes. If a buffer
+	// ReadBufferSize and WriteBufferSize specify I/O buffer sizes in bytes. If a buffer
 	// size is zero, then a useful default size is used. The I/O buffer sizes
 	// do not limit the size of the messages that can be sent or received.
 	ReadBufferSize, WriteBufferSize int

conn.go

@@ -1042,7 +1042,7 @@ func (c *Conn) SetReadDeadline(t time.Time) error {
 	return c.conn.SetReadDeadline(t)
 }
 
-// SetReadLimit sets the maximum size for a message read from the peer. If a
+// SetReadLimit sets the maximum size in bytes for a message read from the peer. If a
 // message exceeds the limit, the connection sends a close message to the peer
 // and returns ErrReadLimit to the application.
 func (c *Conn) SetReadLimit(limit int64) {

server.go

@@ -27,7 +27,7 @@ type Upgrader struct {
 	// HandshakeTimeout specifies the duration for the handshake to complete.
 	HandshakeTimeout time.Duration
 
-	// ReadBufferSize and WriteBufferSize specify I/O buffer sizes. If a buffer
+	// ReadBufferSize and WriteBufferSize specify I/O buffer sizes in bytes. If a buffer
 	// size is zero, then buffers allocated by the HTTP server are used. The
 	// I/O buffer sizes do not limit the size of the messages that can be sent
 	// or received.