Always use struct

src/connection.cpp

@@ -1,11 +1,13 @@
 #include "connection.hpp"
-#include "server.hpp" // Need this for releaseBackToServer implementation
+
 #include <climits>
 #include <cstdio>
 #include <cstdlib>
 #include <errno.h>
 #include <limits.h>
 
+#include "server.hpp" // Need this for releaseBackToServer implementation
+
 // Static thread-local storage for iovec buffer
 static thread_local std::vector<struct iovec> g_iovec_buffer{IOV_MAX};