фикс http keep alive

src/server/connection.cpp

@@ -61,6 +61,8 @@ namespace http::server {
         async_write(socket_, reply_.to_buffers(), [this, self](boost::system::error_code ec, std::size_t) {
             if (!ec && !needClose) {
                 // keep alive Connection
+                request_parser_.reset();
+                request_.reset();
                 doRead();
             } else {
                 connection_manager_.stop(shared_from_this());