runit needs to record stderr and stdout.

If e.g. write outputs are failing, and collectd is trying to tell you about it, you will not see the error in the logs, only in the process table for runsvdir.  

This redirects stdout to stderr so svlogd records the failure.
Shouldn't this clause go at the end of the following line? It seems like this would prevent the next line from executing, but this might just be my rusty-ness with runit.