www/nift: Update to 3.0.3

Don't use bundled lua or luajit.
Remove options about lua versions, set via DEFAULT_VERSIONS.
Add LUAJIT option.
Update WWW.

Changelog:
https://github.com/nifty-site-manager/nsm/blob/master/ReleaseNotes.md

PR: 278203
Reported by: yds <yds@Necessitu.de>
Approved by: submitter is maintainer