Fixing Apache mod_proxy_fcgi SCRIPT_FILENAME et al for good

Hi all, https://github.com/php/php-src/pull/694 and https://github.com/php/php-src/pull/765 brought support for Apache's "SetHandler" based mod_proxy_fcgi-to-FPM interface. Recently, a change in Apache (https://github.com/apache/httpd/commit/cab0bfbb2645bb8f689535e5e2834e2dbc23f5a5) broke this again, so FPM no longer works with Apache 2.4.23 and later. The HTTPD developers are interested in fixing this once and for all, by cleaning up several inconsistencies on their side in one go. However, that would require accompanying changes on the PHP side in all of the FPM and FCGI SAPI's detection logic, and that needs coordinating :) What's the right place for this discussion? Would somebody with the right karma/experience be willing to sign up to https://httpd.apache.org/lists.html#http-dev and join in? Or does a GitHub issue or PR suffice? David P.S. obviously, the 5.6 active support EOL timing isn't ideal for such a change, but we can cross that bridge when we get there ;)