Revert "refactor(nixos): inline reverse proxy HTTP helpers"

This reverts commit 8bfe6de4ea.

configs/nixos/modules/services/reverse-proxy.nix

@@ -9,22 +9,12 @@ let
 
   mkRegistryPath = registryName: host: entry: "registry.${registryName}.${host}.${entry}";
 
-  mkUdpStream = host: entry: port:
+  mkBackend = address: route: "http://${address}:${toString route.port}";
-    let
-      compositeEntry = registry.join host entry;
-      address = compositeEntry.address or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
-    in
-    {
-      inherit host entry port address;
-    };
 
-  generatedVirtualHostList = lib.concatLists (
+  mkVirtualHost = host: entry:
-    lib.mapAttrsToList (
-      host: routes:
-      lib.mapAttrsToList (
-        entry: route:
     let
       compositeEntry = registry.join host entry;
+      route = compositeEntry.route;
       address = compositeEntry.address or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
     in
     {
@@ -33,10 +23,16 @@ let
       value = {
         forceSSL = true;
         enableACME = true;
-            locations."/".proxyPass = "http://${address}:${toString route.port}";
+        locations."/".proxyPass = mkBackend address route;
       };
-        }
+    };
-      ) (lib.filterAttrs (_entry: route: route.port != null) routes)
+
+  generatedVirtualHostList = lib.concatLists (
+    lib.mapAttrsToList (
+      host: routes:
+      lib.mapAttrsToList (entry: _route: mkVirtualHost host entry) (
+        lib.filterAttrs (_entry: route: route.port != null) routes
+      )
     ) registry.route
   );
 
@@ -66,6 +62,15 @@ let
     else
       lib.listToAttrs generatedVirtualHostList;
 
+  mkUdpStream = host: entry: port:
+    let
+      compositeEntry = registry.join host entry;
+      address = compositeEntry.address or (throw "no matching entry in registry.address for ${mkRegistryPath "route" host entry}");
+    in
+    {
+      inherit host entry port address;
+    };
+
   generatedUdpStreams = lib.concatLists (
     lib.mapAttrsToList (
       host: routes: