Convert to mysqli

This commit converts all mysql_* function to the appropriate counterparts
in mysqli.
I used this tool for most of it:
https://github.com/philip/MySQLConverterTool
This makes it possible to continue using MysqlDumper with PHP 7.0

refresh_dblist.php

@@ -44,7 +44,7 @@ foreach ($configFiles as $configFile) {
     include($config['paths']['config'] . $configFile . '.php');
     $out = '';
     if (isset($config['dbconnection']) && is_resource($config['dbconnection'])) {
-        mysql_close($config['dbconnection']);
+        ((is_null($___mysqli_res = mysqli_close($config['dbconnection']))) ? false : $___mysqli_res);
         $config['dbconnection'] = false;
     }
     SetDefault();
@@ -61,4 +61,4 @@ function output($message, $verbose)
         $message = str_replace("\n", NEWLINE, $message);
         echo $message . NEWLINE;
     }
-}
+}