Fix crash when sending SIGINT before starting the http server

sunshine/main.cpp

@@ -154,6 +154,8 @@ int main(int argc, char *argv[]) {
   stream::rtpThread(shutdown_event);
 
   httpThread.join();
+  task_pool.stop();
+  task_pool.join();
 
   return 0;
 }

sunshine/nvhttp.cpp

@@ -846,8 +846,22 @@ void start(std::shared_ptr<safe::signal_t> shutdown_event) {
     return;
   }
 
-  std::thread ssl { &https_server_t::accept_and_run, &https_server };
+  auto accept_and_run = [&](auto *http_server) {
-  std::thread tcp { &http_server_t::accept_and_run, &http_server };
+    try {
+      http_server->accept_and_run();
+    } catch(boost::system::system_error &err) {
+      // It's possible the exception gets thrown after calling http_server->stop() from a different thread
+      if(shutdown_event->peek()) {
+        return;
+      }
+
+      BOOST_LOG(fatal) << "Couldn't start http server to ports ["sv << PORT_HTTPS << ", "sv << PORT_HTTP << "]: "sv << err.what();
+      shutdown_event->raise(true);
+      return;
+    }
+  };
+  std::thread ssl { accept_and_run, &https_server };
+  std::thread tcp { accept_and_run, &http_server };
 
   // Wait for any event
   shutdown_event->view();