JoelSanchez [1] filed a orphan request for jetty [2]:

DziedMaroz commented on 2016-01-26 10:34 about the outdated URL. The URL keeps being wrong, and the package won't work if the URL is not changed. Besides, the version of the package is outdated too. I don't think the maintainer cares about the package anymore.

[1] https://aur.archlinux.org/account/JoelSanchez/ [2] https://aur.archlinux.org/pkgbase/jetty/