elilo, ipmitool and syslinux build from a tracked, in-repo source tarball and no
longer fetch at build time, so the upstream download URL was undocumented. Add
it back as a provenance comment next to the tracked-source block so it is clear
where the tarball came from and where to re-download when bumping the version.
(xnba already records https://ipxe.org/ and goconserver keeps its git repo URL
in $go_repo; grub2-xcat is repackaged from the distribution grub2 and conserver
uses a dummy spec, so neither has a single upstream download URL.)
Signed-off-by: Daniel Hilst <392820+dhilst@users.noreply.github.com>
Daniel Hilst
12b7f10b60