Update from 1.15.7 to 1.15.8.
Update clojure, modsecurity and njs third-party modules to their recent versions.
Disable anonymous telemetry reporting in third-party passenger module
by default.
<ChangeLog>
*) Feature: the $upstream_bytes_sent variable.
Thanks to Piotr Sikora.
*) Feature: new directives in vim syntax highlighting scripts.
Thanks to Gena Makhomed.
*) Bugfix: in the "proxy_cache_background_update" directive.
*) Bugfix: in the "geo" directive when using unix domain listen sockets.
*) Workaround: the "ignoring stale global SSL error ... bad length"
alerts might appear in logs when using the "ssl_early_data" directive with OpenSSL.
*) Bugfix: in nginx/Windows.
*) Bugfix: in the ngx_http_autoindex_module on 32-bit platforms.
</ChangeLog>