Since /run uses tmpfs and /etc/init.d/bootmisc migrate /var/run to /run file /var/run/random-seed will be lost after reboot (actually, all files will be lost, so there is no sense in trying to `cp -a` these files in migrate_to_run() at all). It looks like this file should be moved somewhere in /var/lib.
Actually I'm already noticed it was moved to /var/lib/misc/random-seed and handled by /etc/init.d/urandom, so processing of /var/run/random-seed can be safely dropped from /etc/init.d/bootmisc.
The default location in OpenRc for the random-seed file is /var/lib/misc, so The only way that would be in a different location is if you edited /etc/conf.d/urandom. Also, see bug #454338 wrt cleaning /var/run. Let me know if you have any more questions. Thanks, William
I am closing this as invalid since the issues are addressed in other bugs, but please feel free to re-open if you disagree. Thanks, William