01dbf03628
This reduces the time window during which IP addresses are gone during switch-to-configuration. A complication is that with stopIfChanged = true, preStop would try to delete the *new* IP addresses rather than the old one (since the preStop script now runs after the switch to the new configuration). So we now record the actually configured addresses in /run/nixos/network/addresses/<interface>. This is more robust in any case. Issue https://github.com/NixOS/nixops/issues/640.
*** 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.