Merge branch 'mraszyk/ic-nns-init-http1' into 'master'

add http2_only flag to ic-nns-init

Add `http2-only` flag to `ic-nns-init` that makes it use `HTTP/2` instead of `HTTP/1.1` (default). Currently, `HTTP/2` is the default and this MR makes `HTTP/1.1` the new default.

The motivation for this flag is that our [reference implementation](https://github.com/dfinity/ic-hs) does not fully support `HTTP/2` yet.

Note. DFX uses `HTTP/1.1` for connections to the IC. 

See merge request dfinity-lab/public/ic!12517

Author: mraszyk

rs/nns/init/src/main.rs

@@ -1,7 +1,7 @@
 use canister_test::{RemoteTestRuntime, Runtime};
 use clap::Parser;
 use ic_base_types::{PrincipalId, SubnetId};
-use ic_canister_client::{Agent, Sender};
+use ic_canister_client::{Agent, HttpClientConfig, Sender};
 use ic_nns_common::pb::v1::NeuronId;
 use ic_nns_constants::REGISTRY_CANISTER_ID;
 use ic_nns_governance::pb::v1::Governance as GovernanceProto;
@@ -130,6 +130,10 @@ struct CliArgs {
     /// Pass specified_id to provisional_create_canister_with_cycles when creating canisters.
     #[clap(long)]
     pass_specified_id: bool,
+
+    /// If set, HTTP/2 is used for connections to the IC. By default, HTTP/1.1 is used.
+    #[clap(long)]
+    http2_only: bool,
 }
 
 const LOG_PREFIX: &str = "[ic-nns-init] ";
@@ -186,15 +190,20 @@ async fn main() {
 
         let url = args.url.expect("Url must be provided to install canister.");
 
+        let http_client_config = HttpClientConfig {
+            http2_only: args.http2_only,
+            ..HttpClientConfig::default()
+        };
         let agent = if args.use_hsm {
             let sender = make_hsm_sender(&args.hsm_slot, &args.key_id, &args.pin);
-            Agent::new(url.clone(), sender)
+            Agent::new_with_http_client_config(url.clone(), sender, http_client_config)
         } else {
             // Use the special identity that has superpowers, like calling
             // ic00::Method::ProvisionalCreateCanisterWithCycles.
-            Agent::new(
+            Agent::new_with_http_client_config(
                 url.clone(),
                 Sender::from_keypair(&ic_test_identity::TEST_IDENTITY_KEYPAIR),
+                http_client_config,
             )
         };