NixOS Updates: Kubernetes Security, X.org Driver Changes, and OpenMPI Upgrade

- The [`ndppd`](https://github.com/DanielAdolfsson/ndppd) module now supports [all config options](options.html#opt-services.ndppd.enable) provided by the current upstream version as service options. Additionally the `ndppd` package doesn't contain the systemd unit configuration from upstream anymore, the unit is completely configured by the NixOS module now. - New installs of NixOS will default to the Redmine 4.x series unless otherwise specified in `services.redmine.package` while existing installs of NixOS will default to the Redmine 3.x series. - The [Grafana module](options.html#opt-services.grafana.enable) now supports declarative [datasource and dashboard](http://docs.grafana.org/administration/provisioning/) provisioning. - The use of insecure ports on kubernetes has been deprecated. Thus options: `services.kubernetes.apiserver.port` and `services.kubernetes.controllerManager.port` has been renamed to `.insecurePort`, and default of both options has changed to 0 (disabled). - Note that the default value of `services.kubernetes.apiserver.bindAddress` has changed from 127.0.0.1 to 0.0.0.0, allowing the apiserver to be accessible from outside the master node itself. If the apiserver insecurePort is enabled, it is strongly recommended to only bind on the loopback interface. See: `services.kubernetes.apiserver.insecurebindAddress`. - The option `services.kubernetes.apiserver.allowPrivileged` and `services.kubernetes.kubelet.allowPrivileged` now defaults to false. Disallowing privileged containers on the cluster. - The kubernetes module does no longer add the kubernetes package to `environment.systemPackages` implicitly. - The `intel` driver has been removed from the default list of [X.org video drivers](options.html#opt-services.xserver.videoDrivers). The `modesetting` driver should take over automatically, it is better maintained upstream and has less problems with advanced X11 features. This can lead to a change in the output names used by `xrandr`. Some performance regressions on some GPU models might happen. Some OpenCL and VA-API applications might also break (Beignet seems to provide OpenCL support with `modesetting` driver, too). Kernel mode setting API does not support backlight control, so `xbacklight` tool will not work; backlight level can be controlled directly via `/sys/` or with `brightnessctl`. Users who need this functionality more than multi-output XRandR are advised to add \`intel\` to \`videoDrivers\` and report an issue (or provide additional details in an existing one) - Openmpi has been updated to version 4.0.0, which removes some deprecated MPI-1 symbols. This may break some older applications that still rely on those symbols. An upgrade guide can be found [here](https://www.open-mpi.org/faq/?category=mpi-removed). The nginx package now relies on OpenSSL 1.1 and supports TLS 1.3 by default. You can set the protocols used by the nginx service using [services.nginx.sslProtocols](options.html#opt-services.nginx.sslProtocols). - A new subcommand `nixos-rebuild edit` was added.

This section covers updates in NixOS related to ndppd, Redmine, Grafana, and Kubernetes. Kubernetes now defaults to disallowing privileged containers and has deprecated insecure ports, with related configuration changes. The default X.org video driver list has been updated, removing the 'intel' driver. OpenMPI has been upgraded, which may break older applications. Nginx now supports TLS 1.3 by default. Finally, a new 'nixos-rebuild edit' subcommand was added.