The current config file has a few issues:
- It suggests that a syntax like `COIN = Bitcoin # comment` would do something else than setting `COIN` to `Bitcoin # comment`
- It doesn't contain all settings
- It contains some settings that are not used (e.g. `ELECTRUMX`)
To minimize maintainment overhead, I suggest to keep the default config file small and link to the appropriate documentation that should be up to date.
- Set the open file limit to 8192, which should hopefully be enough
- Set the timeout for process termination to 30 minutes. Systemd will send another SIGTERM after 30 minutes and then a SIGKILL after 60 minutes. That should be plenty of time for electrumx to cleanly finish whatever it's doing
