use zfs legacy mount, because it boots better.

This appeared during boot time, and needed manual interference using Ctrl-D
zfs_mount_at() failed: mountpoint or dataset is busy

nixos/components/network/sshd/known-hosts-bootup.nix

@@ -37,18 +37,18 @@ in
   environment.systemPackages =
     let
 
-      ssh = mapAttrsToList
+      sshTor = mapAttrsToList
         (name:
           { onionId, ... }:
-          pkgs.writers.writeDashBin "ssh-boot-to-${name}" ''
+          pkgs.writers.writeDashBin "ssh-boot-to-${name}-via-tor" ''
             ${pkgs.tor}/bin/torify ${pkgs.openssh}/bin/ssh root@${onionId} -p 2222
           '')
         computers;
 
-      password = mapAttrsToList
+      passwordTor = mapAttrsToList
         (name:
           { onionId, ... }:
-          pkgs.writers.writeDashBin "unlock-boot-${name}" ''
+          pkgs.writers.writeDashBin "unlock-boot-${name}-via-tor" ''
             ${pkgs.tor}/bin/torify ${pkgs.openssh}/bin/ssh root@${onionId} -p 2222 '
             echo -n "enter password : "
             read password
@@ -58,6 +58,6 @@ in
         computers;
 
     in
-    ssh ++ password;
+    sshTor ++ passwordTor;
 
 }