Allow multiple php versions to be run using Nginx and Aegir

You can do this manually by creating a file in /var/aegir/.drush/

This example is for apache but you can use drush_hook_provision_nginx_vhost_config for nginx.

<?php
function foo_provision_apache_vhost_config($uri, $data) {

  $sites = [
    'www.site1.com',
    'www.site2.com',
  ];

  if (in_array($uri, $sites)) {
    return array("
    Include /etc/apache2/conf-available/php7.2-fpm.conf
    ");
  } else {
    return array("
    Include /etc/apache2/conf-available/php7.4-fpm.conf
    ");
  }
}

@ac, nginx does not use .conf files like this. There is not an equivalent for php7.4-fpm.conf.

I upgraded hostmaster to Drupal 7.100 which takes php8.1 and possibly 8.2

I upgraded the file, /var/aegir/config/includes/nginx_vhost_common.conf, to reflect this