fixed sanitized username again...

fixed sanitized username again...

...so it doesn't think it can reset USER variable if it's broken.
also fixed safedel to not loudly complain if its attempted chmod
doesn't work right, which will always happen when, for example, the
www-data user is using feisty meow code, but it cannot chmod the linked
customize directory since that's linked to the real feisty meow
code which www-data has no perms on.