Add max concurrent requests to startup info

Display the configured max_concurrent_requests value in the server
startup information, consistent with other configuration values like
log level, host, port, etc.

src/main.rs

@@ -12,12 +12,13 @@ use tokio::net::TcpListener;
 use tokio_rustls::TlsAcceptor;
 use logging::init_logging;
 
-fn print_startup_info(host: &str, port: u16, root: &str, cert: &str, key: &str, log_level: Option<&str>) {
+fn print_startup_info(host: &str, port: u16, root: &str, cert: &str, key: &str, log_level: Option<&str>, max_concurrent: usize) {
     println!("Pollux Gemini Server");
     println!("Listening on: {}:{}", host, port);
     println!("Serving: {}", root);
     println!("Certificate: {}", cert);
     println!("Key: {}", key);
+    println!("Max concurrent requests: {}", max_concurrent);
     if let Some(level) = log_level {
         println!("Log level: {}", level);
     }
@@ -111,7 +112,7 @@ async fn main() {
     let listener = TcpListener::bind(format!("{}:{}", host, port)).await.unwrap();
     
     // Print startup information
-    print_startup_info(&host, port, &root, &cert_path, &key_path, Some(log_level));
+    print_startup_info(&host, port, &root, &cert_path, &key_path, Some(log_level), max_concurrent_requests);
 
     loop {
         let (stream, _) = listener.accept().await.unwrap();