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_MAKEFILE

$NGX_LIBATOMIC/src/libatomic_ops.a:	$NGX_LIBATOMIC/Makefile
	cd $NGX_LIBATOMIC && \$(MAKE)

$NGX_LIBATOMIC/Makefile:	$NGX_MAKEFILE
	cd $NGX_LIBATOMIC \\
	&& if [ -f Makefile ]; then \$(MAKE) distclean; fi \\
	&& ./configure

END