SSL: use of SSL_MODE_NO_AUTO_CHAIN. The SSL_MODE_NO_AUTO_CHAIN mode prevents OpenSSL from automatically building a certificate chain on the fly if there is no certificate chain explicitly provided. Before this change, certificates provided via the ssl_client_certificate and ssl_trusted_certificate directives were used by OpenSSL to automatically build certificate chains, resulting in unexpected (and in some cases unneeded) chains being sent to clients.

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


cat << END >> $NGX_AUTO_HEADERS_H

#ifndef $have
#define $have  1
#endif

END