use base 'PublicInbox::DS';
use Socket qw(SOL_SOCKET SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
use fields qw(post_accept);
-require IO::Handle;
+use IO::Handle;
use PublicInbox::Syscall qw(EPOLLIN EPOLLEXCLUSIVE EPOLLET);
use Errno qw(EAGAIN ECONNABORTED EPERM);