Remove unused or deprecated functions

virtual "can" be used when served under apache2
https://www.php.net/manual/en/function.virtual.php

dl has been removed since php-fpm 7.0.0
https://www.php.net/manual/en/function.dl.php

Disable popen

Disable escapeshellarg

Disable pclose

Disable symlink

Disable shell_exec

Disable proc_open

Disable proc_get_status

Reorder to less annoy jelle:(
2 jobs for aurweb_php_hardening in 33 seconds (queued for 2 seconds)
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