Respect the new behavior of TCP_DEFER_ACCEPT. In Linux 2.6.32, TCP_DEFER_ACCEPT was changed to accept connections after the deferring period is finished without any data available. (Reading from the socket returns EAGAIN in this case.) Since in nginx TCP_DEFER_ACCEPT is set to "post_accept_timeout", we do not need to wait longer if deferred accept returns with no data.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  0
#endif

END