Changes with nginx 1.17.2 23 Jul 2019
*) Change: minimum supported zlib version is 184.108.40.206. 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.