[PHP] memcached extension needs to be loaded after igbinary extension

[freswa]

For php-8.3-opt-memcached the config lets the module load before the igbinary module which leads to

Sep 25 09:49:29 d02 php-fpm[95634]: [25-Sep-2025 09:49:29] NOTICE: PHP message: PHP Warning:  PHP Startup: Unable to load dynamic library 'memcached.so' (tried: /opt/php-8.3/lib/extensions/no-debug-non-zts-20230831/memcached.so (/opt/php-8.3/lib/extensions/no-debug-non-zts-20230831/memcached.so: undefined symbol: igbinary_serialize), /opt/php-8.3/lib/extensions/no-debug-non-zts-20230831/memcached.so.so (/opt/php-8.3/lib/extensions/no-debug-non-zts-20230831/memcached.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0

Renaming the config to zz_30_memcached.ini fixes the issue.

Also the memcached.ini does not load the module at all without editiing it's content. That's unusual as the other modules load by just installing the package. Maybe that's not intended as well?