Make blocks per request configurable (#13824)

* Make blocks per request configurable

* Correct type

* Update docs

* Update client/cli/src/params/network_params.rs

substrate/client/network/src/config.rs

@@ -566,6 +566,7 @@ pub struct NetworkConfiguration {
 
 	/// List of request-response protocols that the node supports.
 	pub request_response_protocols: Vec<RequestResponseConfig>,
+
 	/// Configuration for the default set of nodes used for block syncing and transactions.
 	pub default_peers_set: SetConfig,
 
@@ -590,6 +591,9 @@ pub struct NetworkConfiguration {
 	/// Maximum number of peers to ask the same blocks in parallel.
 	pub max_parallel_downloads: u32,
 
+	/// Maximum number of blocks per request.
+	pub max_blocks_per_request: u32,
+
 	/// Initial syncing mode.
 	pub sync_mode: SyncMode,
 
@@ -653,6 +657,7 @@ impl NetworkConfiguration {
 			node_name: node_name.into(),
 			transport: TransportConfig::Normal { enable_mdns: false, allow_private_ip: true },
 			max_parallel_downloads: 5,
+			max_blocks_per_request: 64,
 			sync_mode: SyncMode::Full,
 			enable_dht_random_walk: true,
 			allow_non_globals_in_dht: false,