only expand environment-variables of the form ${ENV}
by default, crash on startup if the old $ENV syntax is found,
explaning that the old syntax can be enabled with an option
can check if the current version has a known vulnerability, with the option to panic and exit if so, and otherwise show a warning in the controlpanel for admins
---------
Co-authored-by: ed <s@ocv.me>
* move service files from contrib/package/arch/ to /contrib/systemd/
* add simpler default copyparty.conf that puts users in jail
* remove warning about .conf files in ~/.config/copyparty/
* update PKGBUILD with changes
* add links to configuration examples in index.md
* fix link to the example config
* update README.md arch instructions
---------
Co-authored-by: icxes <icxes@dev.null@need.moe>
Co-authored-by: ed <s@ocv.me>
