BUG: (?) sipproxd.pid in root folder (/) instead of in /var/run/ ?

[rcfa]

I was just poking around the file system in search for answer to some other question, something I rarely do, since let's face it, that the point of the web UI.

Anyway, as I do so, I find that in the root directory (/) I find the file

/siproxd.pid

which I'd expect to be

/var/run/siproxd.pid

Is this a bug? Or why is it there?