Discarding Handshake packets if no Handshake keys yet. Found with a previously received Initial packet with ACK only, which instantiates a new connection but do not produce the handshake keys. This can be triggered by a fairly well behaving client, if the server stands behind a load balancer that stripped Initial packets exchange. Found by F5 test suite.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  1
#endif

END