generate documentation from config.sample.php

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -1172,10 +1172,11 @@ All other configuration options
 
 	'dbdriveroptions' => array(
 		PDO::MYSQL_ATTR_SSL_CA => '/file/path/to/ca_cert.pem',
+		PDO::MYSQL_ATTR_INIT_COMMAND => 'SET wait_timeout = 28800'
 	),
 
 Additional driver options for the database connection, eg. to enable SSL
-encryption in MySQL.
+encryption in MySQL or specify a custom wait timeout on a cheap hoster.
 
 ::