Nginx 1.12 has been released on April 12th 2017, bringing a number of new features and capabilities to the 1.11 mainline branch: dynamic modules, IP Transparency, improved TCP/UDP load balancing, better caching performance, and more. You will find more details on this blog post.
Nginx 1.12.1 has then been released on July 12th, 2017 to fix an integer overflow in the range filter (CVE-2017-7529).
As a consequence, packages of Nginx 1.12.1 are now available for Debian 8 “Jessie” (with or without full HTTP2 support – see the instructions), on both amd64 and i386 architectures.
For more details about which modules are included in the different Nginx flavors (light, full and extras), just take a look at the configuration options in the Makefile.