Use include <cstring> and std::memcpy etc

src/server.cpp

@@ -131,7 +131,7 @@ void Server::shutdown() {
     // Write single byte to avoid partial write complexity
     while (write(shutdown_pipe_[1], &val, 1) == -1) {
       if (errno != EINTR) {
-        abort(); // graceful shutdown didn't work. Let's go ungraceful.
+        std::abort(); // graceful shutdown didn't work. Let's go ungraceful.
       }
     }
   }
@@ -328,7 +328,7 @@ void Server::start_io_threads(std::vector<std::thread> &threads) {
             continue;
           }
           perror("epoll_wait");
-          abort();
+          std::abort();
         }
 
         ready_listen_fds.clear(); // Clear from previous iteration
@@ -384,7 +384,7 @@ void Server::start_io_threads(std::vector<std::thread> &threads) {
               if (errno == EINTR)
                 continue;
               perror("accept4");
-              abort();
+              std::abort();
             }
 
             // Check connection limit