Amend connection limit comment, use expect for handling join results

Author: DJAndries

src/main.rs

@@ -116,7 +116,8 @@ struct Cli {
     #[arg(short = 'd', long, default_value = DEFAULT_DEST_ADDR, value_delimiter=',')]
     destination_addresses: Vec<String>,
 
-    /// Maximum amount of allowed concurrent connections
+    /// Maximum amount of allowed concurrent connections.
+    /// The limit will be enforced separately for each source/destination pair.
     #[arg(short = 'c', long, default_value_t = 1250)]
     max_concurrent_connections: usize,
 
@@ -312,5 +313,10 @@ async fn main() -> Result<()> {
             })
         })
         .collect::<JoinSet<_>>();
-    join_set.join_next().await.unwrap().unwrap().unwrap()
+    join_set
+        .join_next()
+        .await
+        .expect("join set should not be empty")
+        .expect("join result from join set should not result in join error")
+        .expect("async task should not result in join error")
 }