refactor(ssh): centralize SSH config into ssh module

home/modules/deploy/colmena-wrapper.bash

@@ -1,6 +1,6 @@
 # `colmena` wrapper script that opens a short-lived SSH master process for
 # `colmena` to use so it works with hardware-backed key touch+PIN. assumes
-# ControlPath ~/.ssh/socket-%r@%h:%p (see ./default.nix)
+# ControlPath ~/.ssh/control/%C (see ../ssh/default.nix)
 
 selector=""
 want_on=0

home/modules/deploy/default.nix

@@ -61,16 +61,5 @@ in
       colmenaWrapped
       deployRsWrapped
     ];
-    programs.ssh.settings = lib.genAttrs hostsWithKeys (
-      hostname:
-      let
-        meta = myUtils.hostMeta (hostDir + "/${hostname}");
-      in
-      {
-        User = meta.host.username;
-        HostName = hostname;
-        ControlPath = "~/.ssh/socket-%r@%h:%p";
-      }
-    );
   };
 }

home/modules/deploy/deploy-rs-wrapper.bash

@@ -1,6 +1,6 @@
 # `deploy` wrapper script that opens a short-lived SSH master process for
 # `deploy-rs` to use so it works with hardware-backed key touch+PIN. assumes
-# ControlPath ~/.ssh/socket-%r@%h:%p (see ./default.nix)
+# ControlPath ~/.ssh/control/%C (see ../ssh/default.nix)
 
 # extract the target host from the `deploy-rs` flake target (e.g. `.#hecuba`)
 node=""