Iperf: after saving settings on server tab, page reloads mostly empty

[rcfa]

I guess this is best described by two pictures; the first one, when one selects the tab, the second one is what is the result after hitting the save button. 100% repeatable here, with all more or less recent 2.1 betas, on amd64 architecture.


[jimp]

Might need the same fixes I had to do for mtr and/or nmap. I thought I checked in a fix for the pkg system in general but I could be misremembering it, as it's been a few weeks since I did all that work.