patches/packages: php8: tuning of default options
- Turris OS 5 - OpenWrt 19.07 only had php7
- Turris OS 6 - OpenWrt 21.02 has both php7 and php8
- Turris OS 7 - Openwrt 22.03 only has php8
The performance tuning is only not done for php8 on TOS6, this PR fixes it. This could technically be a breaking change because doc_root changes from /www to /srv/www. This patch is copied from hbl and only affects php8, php7 is not affected by this.
part of packages#887 (closed)