483dbe9237
This permits using method_set_hostname but still denies method_set_static_hostname. As a result DHCP clients can now always set the transient hostname via the SetHostname method of the D-Bus interface of systemd-hostnamed (org.freedesktop.hostname1.set-hostname). If the NixOS option networking.hostName is set to an empty string (or "localhost") the static hostname (kernel.hostname but NOT /etc/hostname) will additionally be updated (this is intended). From "man hostnamectl": The transient hostname is a fallback value received from network configuration. If a static hostname is set, and is valid (something other than localhost), then the transient hostname is not used. Fix #74847. Note: It's possible to restrict access to the org.freedesktop.hostname1 interface using Polkit rules.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.