humanmade/backupwordpress — pull request #260 by willmot (2014-03-14 16:53:00+00:00)
Title: Backup on multisite fails to backup actual site root when wordpress is in a subdir

With a structure like this:

```
./wordpress/
./content
./themes
./plugins
```

the backup will only contain the wordpress dir, as home_url() and site_url() don't include wordpress, so `ABSPATH` is chosen as root.