nix-daemon: Lower verbosity of restricted setting warning
nix-daemon: Lower verbosity of restricted setting warning

Fixes #3992.

rycee/nix,NixOS/nix,NixOS/nix,NixOS/nix,NixOS/nix,NixOS/nix,rycee/nix,rycee/nix,rycee/nix,rycee/nix