16a1339ec7
Changes with nginx 1.17.3
*) Security: when using HTTP/2 a client might cause excessive memory
consumption and CPU usage (CVE-2019-9511, CVE-2019-9513,
CVE-2019-9516).
*) Bugfix: "zero size buf" alerts might appear in logs when using
gzipping; the bug had appeared in 1.17.2.
*) Bugfix: a segmentation fault might occur in a worker process if the
"resolver" directive was used in SMTP proxy.
Changes with nginx 1.17.2
*) Change: minimum supported zlib version is 1.2.0.4.
Thanks to Ilya Leoshkevich.
*) Change: the $r->internal_redirect() embedded perl method now expects
escaped URIs.
*) Feature: it is now possible to switch to a named location using the
$r->internal_redirect() embedded perl method.
*) Bugfix: in error handling in embedded perl.
*) Bugfix: a segmentation fault might occur on start or during
reconfiguration if hash bucket size larger than 64 kilobytes was used
in the configuration.
*) Bugfix: nginx might hog CPU during unbuffered proxying and when
proxying WebSocket connections if the select, poll, or /dev/poll
methods were used.
*) Bugfix: in the ngx_http_xslt_filter_module.
*) Bugfix: in the ngx_http_ssi_filter_module.
Changes with nginx 1.17.1
*) Feature: the "limit_req_dry_run" directive.
*) Feature: when using the "hash" directive inside the "upstream" block
an empty hash key now triggers round-robin balancing.
Thanks to Niklas Keller.
*) Bugfix: a segmentation fault might occur in a worker process if
caching was used along with the "image_filter" directive, and errors
with code 415 were redirected with the "error_page" directive; the
bug had appeared in 1.11.10.
*) Bugfix: a segmentation fault might occur in a worker process if
embedded perl was used; the bug had appeared in 1.7.3.
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