NixOS 18.09: New Services and Backward Incompatibilities

`services.strongswan-swanctl` uses the [swanctl](https://wiki.strongswan.org/projects/strongswan/wiki/swanctl) command which uses the modern [vici](https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md) _Versatile IKE Configuration Interface_. The deprecated `ipsec` command used in `services.strongswan` is using the legacy [stroke configuration interface](https://github.com/strongswan/strongswan/blob/master/README_LEGACY.md). - The new `services.elasticsearch-curator` service periodically curates or manages, your Elasticsearch indices and snapshots. Every new services: - `./config/xdg/autostart.nix` - `./config/xdg/icons.nix` - `./config/xdg/menus.nix` - `./config/xdg/mime.nix` - `./hardware/brightnessctl.nix` - `./hardware/onlykey.nix` - `./hardware/video/uvcvideo/default.nix` - `./misc/documentation.nix` - `./programs/firejail.nix` - `./programs/iftop.nix` - `./programs/sedutil.nix` - `./programs/singularity.nix` - `./programs/xss-lock.nix` - `./programs/zsh/zsh-autosuggestions.nix` - `./services/admin/oxidized.nix` - `./services/backup/duplicati.nix` - `./services/backup/restic.nix` - `./services/backup/restic-rest-server.nix` - `./services/cluster/hadoop/default.nix` - `./services/databases/aerospike.nix` - `./services/databases/monetdb.nix` - `./services/desktops/bamf.nix` - `./services/desktops/flatpak.nix` - `./services/desktops/zeitgeist.nix` - `./services/development/bloop.nix` - `./services/development/jupyter/default.nix` - `./services/hardware/lcd.nix` - `./services/hardware/undervolt.nix` - `./services/misc/clipmenu.nix` - `./services/misc/gitweb.nix` - `./services/misc/serviio.nix` - `./services/misc/safeeyes.nix` - `./services/misc/sysprof.nix` - `./services/misc/weechat.nix` - `./services/monitoring/datadog-agent.nix` - `./services/monitoring/incron.nix` - `./services/networking/dnsdist.nix` - `./services/networking/freeradius.nix` - `./services/networking/hans.nix` - `./services/networking/morty.nix` - `./services/networking/ndppd.nix` - `./services/networking/ocserv.nix` - `./services/networking/owamp.nix` - `./services/networking/quagga.nix` - `./services/networking/shadowsocks.nix` - `./services/networking/stubby.nix` - `./services/networking/zeronet.nix` - `./services/security/certmgr.nix` - `./services/security/cfssl.nix` - `./services/security/oauth2_proxy_nginx.nix` - `./services/web-apps/virtlyst.nix` - `./services/web-apps/youtrack.nix` - `./services/web-servers/hitch/default.nix` - `./services/web-servers/hydron.nix` - `./services/web-servers/meguca.nix` - `./services/web-servers/nginx/gitweb.nix` - `./virtualisation/kvmgt.nix` - `./virtualisation/qemu-guest-agent.nix` ## Backward Incompatibilities {#sec-release-18.09-incompatibilities} When upgrading from a previous release, please be aware of the following incompatible changes: - Some licenses that were incorrectly not marked as unfree now are. This is the case for: - cc-by-nc-sa-20: Creative Commons Attribution Non Commercial Share Alike 2.0 - cc-by-nc-sa-25: Creative Commons Attribution Non Commercial Share Alike 2.5 - cc-by-nc-sa-30: Creative Commons Attribution Non Commercial Share Alike 3.0 - cc-by-nc-sa-40: Creative Commons Attribution Non Commercial Share Alike 4.0 - cc-by-nd-30: Creative Commons Attribution-No Derivative Works v3.00 - msrla: Microsoft Research License Agreement - The deprecated `services.cassandra` module has seen a complete rewrite. (See above.) - `lib.strict` is removed. Use `builtins.seq` instead. - The `clementine` package points now to the free derivation. `clementineFree` is removed now and `clementineUnfree` points to the package which is bundled with the unfree `libspotify` package. - The `netcat` package is now taken directly from OpenBSD's `libressl`, instead of relying on Debian's fork. The new version should be very close to the old version, but there are some minor differences. Importantly, flags like -b, -q, -C, and -Z are no longer accepted by the nc command.

This section details new services introduced in NixOS 18.09, including strongswan-swanctl and elasticsearch-curator, followed by an extensive list of new service files. Additionally, it outlines backward incompatibilities encountered when upgrading from previous NixOS releases, such as licenses now marked as unfree (e.g., Creative Commons licenses), a complete rewrite of the deprecated cassandra module, removal of lib.strict, changes to the clementine package to point to the free derivation, and changes to the netcat package affecting certain command flags.