Switch to custom compiled php

etc/systemd/system/php7.4-fpm@default.service

@@ -0,0 +1,36 @@
+[Unit]
+Description=The PHP 7.4 FastCGI Process Manager
+Documentation=man:php-fpm7.4(8)
+After=network.target
+PartOf=php7.4-fpm.service
+ReloadPropagatedFrom=php7.4-fpm.service
+
+[Service] 
+Type=notify
+PIDFile=/run/php/php7.4-fpm.pid
+ExecStart=/usr/sbin/php-fpm7.4 --nodaemonize --fpm-config /etc/php/7.4/fpm/php-fpm.conf
+ExecReload=/bin/kill -USR2 $MAINPID
+LimitNOFILE=100000
+TimeoutStartSec=300
+ProtectSystem=strict
+PrivateTmp=true
+# sendmail requires it... enable once chrooted
+#NoNewPrivileges=true
+PrivateDevices=true
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectControlGroups=true
+LockPersonality=true
+SystemCallArchitectures=native
+ReadWritePaths=-/var/log/
+ReadWritePaths=-/var/run/
+ReadWritePaths=-/run/
+ReadWritePaths=-/var/local/squirrelmail/
+ReadWritePaths=-/var/www/
+InaccessiblePaths=-/root/
+CPUQuota=100%
+MemoryHigh=25%
+MemoryMax=35%
+
+[Install]
+WantedBy=multi-user.target