lighttpd: include some updates from old repository package

Signed-off-by: W. Michael Petullo <mike@flyn.org>

This should bring the lighttpd package up to date with respect to the package in the old packages repository.
In modern trunk, you can get the users added with USERID in the package makefile. See https://github.com/openwrt/packages/pull/317  (or at least, you will be able to.... realllly soon now)