Break out if we ever make it too far from home. Fixes #8428 props st_falcon.

git-svn-id: https://develop.svn.wordpress.org/trunk@9970 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/functions.php

@@ -1744,9 +1744,9 @@ function wp_mkdir_p( $target ) {
 	}
 
 	// If the above failed, attempt to create the parent node, then try again.
-	if ( wp_mkdir_p( dirname( $target ) ) )
+	if ( ( $target != '/' ) && ( wp_mkdir_p( dirname( $target ) ) ) )
 		return wp_mkdir_p( $target );
-
+	
 	return false;
 }