Use include <cstring> and std::memcpy etc

src/connection_registry.cpp

@@ -47,7 +47,7 @@ ConnectionRegistry::~ConnectionRegistry() {
 
 void ConnectionRegistry::store(int fd, std::unique_ptr<Connection> connection) {
   if (fd < 0 || static_cast<size_t>(fd) >= max_fds_) {
-    abort();
+    std::abort();
   }
   // Release ownership from unique_ptr and store raw pointer
   connections_[fd].store(connection.release(), std::memory_order_release);
@@ -55,7 +55,7 @@ void ConnectionRegistry::store(int fd, std::unique_ptr<Connection> connection) {
 
 std::unique_ptr<Connection> ConnectionRegistry::remove(int fd) {
   if (fd < 0 || static_cast<size_t>(fd) >= max_fds_) {
-    abort();
+    std::abort();
   }
   return std::unique_ptr<Connection>(
       connections_[fd].exchange(nullptr, std::memory_order_acquire));