Building `--with-fpm` without `--prefix` adds `NONE` to include path in `php-fpm.conf.default`

Description

There's a small bug while building php-fpm, but with no prefix definition. After build process you get an /usr/local/etc/php-fpm.conf.default, but the include path is wrong;

# current
include=NONE/etc/php-fpm.d/*.conf

# should
include=/usr/local/etc/php-fpm.d/*.conf

To solve this, you can simply run ./configure with --prefix=/usr/local flag.

I searched a bit in the code & think there's a missing default setting in C, but I'm too stupid for that language :-) Found out following lines of code, may this will help a bit for faster debugging :-)
https://github.com/php/php-src/blob/master/sapi/fpm/php-fpm.conf.in#L142
https://github.com/php/php-src/blob/master/sapi/fpm/config.m4#L502
https://github.com/php/php-src/blob/master/main/build-defs.h.in#L28

PS: There's an old workaround in current official docker images for that, seems they were too frustrated a) trying a rebuild with prefix flag & b) opening an issue :D
https://github.com/docker-library/php/blob/master/8.5/alpine3.23/fpm/Dockerfile#L211
PS²: Is it possible to generate the config-files without ´.default` suffix? :)

PHP Version

even before php8 era

Operating System

No response