Changes with nginx 1.23.0 21 Jun 2022
*) Change in internal API: now header lines are represented as linked
lists.
*) Change: now nginx combines arbitrary header lines with identical
names when sending to FastCGI, SCGI, and uwsgi backends, in the
$r->header_in() method of the ngx_http_perl_module, and during lookup
of the "$http_...", "$sent_http_...",
"$sent_trailer_...",
"$upstream_http_...", and "$upstream_trailer_..."
variables.
*) Bugfix: if there were multiple "Vary" header lines in the
backend
response, nginx only used the last of them when caching.
*) Bugfix: if there were multiple "WWW-Authenticate" header lines
in the
backend response and errors with code 401 were intercepted or the
"auth_request" directive was used, nginx only sent the first of
the
header lines to the client.
*) Change: the logging level of the "application data after close
notify" SSL errors has been lowered from "crit" to
"info".
*) Bugfix: connections might hang if nginx was built on Linux 2.6.17 or
newer, but was used on systems without EPOLLRDHUP support, notably
with epoll emulation layers; the bug had appeared in 1.17.5.
Thanks to Marcus Ball.
*) Bugfix: nginx did not cache the response if the "Expires"
response
header line disabled caching, but following "Cache-Control"
header
line enabled caching.
--
Maxim Dounin
http://nginx.org/
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