Fixes #393: Document required change to switch from PHP-FPM to mod_ph…

…p for Apache.

example.config.yml

@@ -186,14 +186,18 @@ php_version: "5.6"
 php_memory_limit: "192M"
 php_display_errors: "On"
 php_display_startup_errors: "On"
-php_enable_php_fpm: true
 php_realpath_cache_size: "1024K"
 php_sendmail_path: "/usr/sbin/ssmtp -t"
 php_opcache_enabled_in_ini: true
 php_opcache_memory_consumption: "192"
 php_opcache_max_accelerated_files: 4096
 php_max_input_vars: "4000"
 
+# Drupal VM defaults to using PHP-FPM with either Apache or Nginx. If you wish
+# to instead use Apache + mod_php with an Ubuntu base box, make sure you add
+# libapache2-mod-php5 to `extra_packages` elsewhere in this config file.
+php_enable_php_fpm: true
+
 composer_path: /usr/bin/composer
 composer_home_path: '/home/vagrant/.composer'
 # composer_global_packages: