Upstream at https://www.gnu.org/software/xhippo/ no longer provides distfiles since at least 2019, FreeBSD also has marked the port as such; the website says
The GNU xhippo has been decommissioned.
I think we should stop carrying such cruft.
Other ports such as audio/mkplaylist do similar jobs, most media players
also have such functionality, e.g. VLC does.
OK?
