Created attachment 9234 migrate_goodies_url-diskperf.patch The attached patch updates the URLs of xfce4-diskperf-plugin from goodies.xfce.org to docs.xfce.org.
Kevin Bowen referenced this bugreport in commit 81a5ad536282518e5fe20cb1f965706cb6795e39 Update URLs from goodies.x.o to docs.x.o (Bug #16160) https://git.xfce.org/panel-plugins/xfce4-diskperf-plugin/commit?id=81a5ad536282518e5fe20cb1f965706cb6795e39