New comment by mobinmob on void-packages repository

https://github.com/void-linux/void-packages/pull/25743#issuecomment-1047118008

Comment:
#### boot-66serv changes:

- Install backwards compatibility symlink for removed `/usr/share/66/script/modules.sh` script. That is not needed if someone re-enables boot@system after update but it is a failsafe.
- Add `INSTALL.msg` to remind users to re-enable boot@system after an update.
- Mount efivarfs rw, to have the same behavior as the official runit scheme - reported by @paper42, many thanks :)