Sync ZRAM with OH upgrades

No that’s misleading. /srv mounts, strictly speaking, are there irrespective of ZRAM or not. If you want to verify if that’s running, systemctl status zram-config or similar should do and I’m sure @benjy knows.
Mounting order of /srv/* and ZRAM mounts is what I just revamped (or tried to), see post 61.
If you don’t mind I’d like you to test that code for yourself as well.