fd0f8adaab
This enhances #61423, which removed the gating of desktop-managers from being linked to the xserver's state. This, though, brought in xterm into all systems, even those without X servers. This change sets the *default* of the xterm desktop-manager to the state of the xserver, keeping it enabled by default as a sane fallback. The xterm desktop-manager can still be enabled or disabled as needed, without it being affected by xserver's state.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.