Fix documentation for max_send_buffer_size (#718)

Author: Protryon

src/client.rs

@@ -1023,7 +1023,7 @@ impl Builder {
     /// stream have been written to the connection, the send buffer capacity
     /// will be freed up again.
     ///
-    /// The default is currently ~400MB, but may change.
+    /// The default is currently ~400KB, but may change.
     ///
     /// # Panics
     ///

src/server.rs

@@ -937,7 +937,7 @@ impl Builder {
     /// stream have been written to the connection, the send buffer capacity
     /// will be freed up again.
     ///
-    /// The default is currently ~400MB, but may change.
+    /// The default is currently ~400KB, but may change.
     ///
     /// # Panics
     ///