make start_server available in cli

src/main.rs

@@ -71,6 +71,8 @@ fn main() {
         if options.len() > 3 {
             remote_host = options[3].clone();
         }
+        common::test_rendezvous_server();
+        common::test_nat_type();
         let key = matches.value_of("key").unwrap_or("").to_owned();
         let token = LocalConfig::get_option("access_token");
         cli::start_one_port_forward(
@@ -81,6 +83,8 @@ fn main() {
             key,
             token,
         );
+    } else if let Some(p) = matches.value_of("server") {
+        crate::start_server(true);
     }
     common::global_clean();
 }