Enable yamux flow control by default (#5734)

* Enable yamux flow control by default

* Tweak description

* Apply suggestions from code review

substrate/client/cli/src/params/network_params.rs

@@ -85,9 +85,10 @@ pub struct NetworkParams {
 	#[structopt(flatten)]
 	pub node_key_params: NodeKeyParams,
 
-	/// Experimental feature flag.
-	#[structopt(long = "use-yamux-flow-control")]
-	pub use_yamux_flow_control: bool,
+	/// Disable the yamux flow control. This option will be removed in the future once there is
+	/// enough confidence that this feature is properly working.
+	#[structopt(long)]
+	pub no_yamux_flow_control: bool,
 }
 
 impl NetworkParams {
@@ -137,7 +138,7 @@ impl NetworkParams {
 				enable_mdns: !is_dev && !self.no_mdns,
 				allow_private_ipv4: !self.no_private_ipv4,
 				wasm_external_transport: None,
-				use_yamux_flow_control: self.use_yamux_flow_control,
+				use_yamux_flow_control: !self.no_yamux_flow_control,
 			},
 			max_parallel_downloads: self.max_parallel_downloads,
 		}