Flush the cache for upgrades. Flesh out __get_option().

git-svn-id: https://develop.svn.wordpress.org/trunk@3129 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/upgrade.php

@@ -74,8 +74,10 @@ switch($step) {
 	break;
 	
 	case 1:
+	wp_cache_flush();
 	make_db_current_silent();
 	upgrade_all();
+	wp_cache_flush();
 ?> 
 <h2><?php _e('Step 1'); ?></h2> 
 	<p><?php printf(__("There's actually only one step. So if you see this, you're done. <a href='%s'>Have fun</a>!"), __get_option('home')); ?></p>