Changes with nginx 1.11.10 14 Feb 2017

*) Change: cache header format has been changed, previously cached
responses will be invalidated.

*) Feature: support of "stale-while-revalidate" and "stale-if-error"
extensions in the "Cache-Control" backend response header line.

*) Feature: the "proxy_cache_background_update",
"fastcgi_cache_background_update", "scgi_cache_background_update",
and "uwsgi_cache_background_update" directives.

*) Feature: nginx is now able to cache responses with the "Vary" header
line up to 128 characters long (instead of 42 characters in previous
versions).

*) Feature: the "build" parameter of the "server_tokens" directive.
Thanks to Tom Thorogood.

*) Bugfix: "[crit] SSL_write() failed" messages might appear in logs
when handling requests with the "Expect: 100-continue" request header
line.

*) Bugfix: the ngx_http_slice_module did not work in named locations.

*) Bugfix: a segmentation fault might occur in a worker process when
using AIO after an "X-Accel-Redirect" redirection.

*) Bugfix: reduced memory consumption for long-lived requests using
gzipping.


--
Maxim Dounin
http://nginx.org/
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