Changes with nginx 1.12.2 17 Oct 2017
*) Bugfix: client SSL connections were immediately closed if deferred accept and the "proxy_protocol" parameter of the "listen" directive were used.
*) Bugfix: client connections might be dropped during configuration testing when using the "reuseport" parameter of the "listen" directive on Linux.
*) Bugfix: incorrect response length was returned on 32-bit platforms when requesting more than 4 gigabytes with multiple ranges.
*) Bugfix: switching to the next upstream server in the stream module did not work when using the "ssl_preread" directive.
*) Bugfix: when using HTTP/2 client request body might be corrupted.
*) Bugfix: in handling of client addresses when using unix domain sockets.