docs: more accurate about default HTTP2 window sizes (#3007)

Author: seanmonstar

src/async_impl/client.rs

@@ -1566,7 +1566,7 @@ impl ClientBuilder {
 
     /// Sets the `SETTINGS_INITIAL_WINDOW_SIZE` option for HTTP2 stream-level flow control.
     ///
-    /// Default is currently 65,535 but may change internally to optimize for common uses.
+    /// Default may change internally to optimize for common uses.
     #[cfg(feature = "http2")]
     #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
     pub fn http2_initial_stream_window_size(mut self, sz: impl Into<Option<u32>>) -> ClientBuilder {
@@ -1576,7 +1576,7 @@ impl ClientBuilder {
 
     /// Sets the max connection-level flow control for HTTP2
     ///
-    /// Default is currently 65,535 but may change internally to optimize for common uses.
+    /// Default may change internally to optimize for common uses.
     #[cfg(feature = "http2")]
     #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
     pub fn http2_initial_connection_window_size(

src/blocking/client.rs

@@ -484,7 +484,7 @@ impl ClientBuilder {
 
     /// Sets the `SETTINGS_INITIAL_WINDOW_SIZE` option for HTTP2 stream-level flow control.
     ///
-    /// Default is currently 65,535 but may change internally to optimize for common uses.
+    /// Default may change internally to optimize for common uses.
     #[cfg(feature = "http2")]
     #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
     pub fn http2_initial_stream_window_size(self, sz: impl Into<Option<u32>>) -> ClientBuilder {
@@ -493,7 +493,7 @@ impl ClientBuilder {
 
     /// Sets the max connection-level flow control for HTTP2
     ///
-    /// Default is currently 65,535 but may change internally to optimize for common uses.
+    /// Default may change internally to optimize for common uses.
     #[cfg(feature = "http2")]
     #[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
     pub fn http2_initial_connection_window_size(self, sz: impl Into<Option<u32>>) -> ClientBuilder {