To reproduce:

* Install fresh Fedora 34 VM
* Compile Bitcoin Core and run `./test/functional/p2p_dns_seeds.py`
break;
    case SyscallSandboxPolicy::NET: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::NET_ADD_CONNECTION: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::NET_HTTP_SERVER: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::NET_HTTP_SERVER_WORKER: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::NET_OPEN_CONNECTION: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::SCHEDULER: 
        seccomp_policy_builder.AllowFileSystem();
        break;
    case SyscallSandboxPolicy::TOR_CONTROL: 
        seccomp_policy_builder.AllowFileSystem();
        seccomp_policy_builder.AllowNetwork();
        break;
    case SyscallSandboxPolicy::TX_INDEX: 
        seccomp_policy_builder.AllowFileSystem();