Добрый день, столкнулся с такой же проблемой. Подскажите было ли найдено ее решение за прошедшие 2 года?
Готов сотрудничать для решения вопроса))

nginx -V
nginx version: nginx/1.8.1
built by gcc 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04)
built with OpenSSL 1.0.1f 6 Jan 2014
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_stub_status_module --with-http_auth_request_module --with-mail --with-mail_ssl_module --with-file-aio --with-http_spdy_module --with-http_image_filter_module --with-ipv6 --add-module=SOURCES/ngx_http_redis-0.3.8 --add-module=SOURCES/ngx_cache_purge-2.3 --add-module=SOURCES/redis2-nginx-module-master --add-module=SOURCES/lua-nginx-module-0.10.0 --add-module=SOURCES/ngx_devel_kit-0.2.19

curl -V
curl 7.49.1 (x86_64-redhat-linux-gnu) libcurl/7.49.1 OpenSSL/1.0.1e zlib/1.2.3 c-ares/1.11.0 libidn/1.18 libssh2/1.7.0 nghttp2/1.6.0
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz HTTP2 UnixSockets Metalin