Really always restart systemd units

nix/home.nix

@@ -1082,6 +1082,13 @@ in {
         in {
           TimeoutStartSec = "infinity";
           Restart = "always";
+          # Disable start limit.
+          # https://unix.stackexchange.com/questions/289629/systemd-restart-always-is-not-honored
+          StartLimitIntervalSec = 0;
+          # The first delay is approximately half a second.
+          RestartSteps = 20;
+          # 2^20s. A little over one month.
+          RestartSecMax = 104857;
           # watch and repeat parameter can't handle non-existent folders.
           # So we have to run unison without watch and repeat first.
           ExecStartPre = "-${pkgs.unison}/bin/unison ${commonArgs} %i";
@@ -1200,6 +1207,14 @@ in {
         };
         Timer = { OnBootSec = "3min"; };
         Service = {
+          Restart = "always";
+          # Disable start limit.
+          # https://unix.stackexchange.com/questions/289629/systemd-restart-always-is-not-honored
+          StartLimitIntervalSec = 0;
+          # The first delay is approximately half a second.
+          RestartSteps = 20;
+          # 2^20s. A little over one month.
+          RestartSecMax = 104857;
           # It is ok to pass a non-existent key file. Ssh will warn us, but won't panic.
           ExecStart =
             "${pkgs.autossh}/bin/autossh -i %h/.ssh/id_ed25519_autossh $SSH_OPTIONS %i";