Varyfield in HTTP header to control caching
nginx-plus-extras: NGINX Plus with additional modules: GeoIP, Headers-More, Image Filter, Lua, Phusion Passenger, Perl, RTMP, Set-Misc, and XSLT; also the Lua library for the Redis client driver. Supports HTTP/2.
For details about these modules, see the NGINX Plus Dynamic Modules section below. Note that not all dynamic modules listed there are built into the nginx‑plus‑extras package.
Note – NGINX Plus R10 is the last release that will include the nginx‑plus‑extras package. We strongly recommend that you modify your installation and configuration procedures now to use the nginx‑plus package and dynamically load the modules in the nginx‑plus‑extras package that you actually use. Starting in NGINX Plus R11, this will be the only possible way to use modules that are not built into the nginx‑plus package.
Content-Typefield of HTTP response header, and define or convert between character sets
Refererfield in HTTP request header
User-Agentfield in HTTP request header