こんにちは、鯨井貴博@opensourcetechです。
昨日、nginx mainline最新バージョンである1.9.12がリリースされました!

変更内容としては、以下となります。
Changes with nginx 1.9.12 24 Feb 2016
*) Feature: Huffman encoding of response headers in HTTP/2.
Thanks to Vlad Krasnov.
*) Feature: the "worker_cpu_affinity" directive now supports more than
64 CPUs.
*) Bugfix: compatibility with 3rd party C++ modules; the bug had
appeared in 1.9.11.
Thanks to Piotr Sikora.
*) Bugfix: nginx could not be built statically with OpenSSL on Linux;
the bug had appeared in 1.9.11.
*) Bugfix: the "add_header ... always" directive with an empty value did
not delete "Last-Modified" and "ETag" header lines from error
responses.
*) Workaround: "called a function you should not call" and "shutdown
while in init" messages might appear in logs when using OpenSSL
1.0.2f.
*) Bugfix: invalid headers might be logged incorrectly.
*) Bugfix: socket leak when using HTTP/2.
*) Bugfix: in the ngx_http_v2_module.
from http://nginx.org/en/CHANGES
今回は、機能追加2点と、Bugfix中心な内容ですね。