New review comment by heliocat on void-packages repository

https://github.com/void-linux/void-packages/pull/30599#discussion_r624799957

Comment:
When running a supervisor you shouldn't need to scrape the process table to find out a process id. A better solution is to ask runsv directly. Something like `if [ $(realpath /proc/$(head -n1 /var/service/xenconsoled/supervise/pid)/exe = /usr/bin/pause ]; then` will get you the same result without needing a magic name and risking collisions.