[remote-build] use full dns names

roles/remote-build/default.nix

@@ -35,12 +35,12 @@
 #    a) Configure builders in configuration.nix:
 #       roles.remote-build.builders = [
 #         {
-#           hostName = "zix790prors";
+#           hostName = "zix790prors.oglehome";
 #           maxJobs = 16;      # Number of parallel build jobs
 #           speedFactor = 3;   # Higher = prefer this builder
 #         }
 #         {
-#           hostName = "john-endesktop";
+#           hostName = "john-endesktop.oglehome";
 #           maxJobs = 1;       # Conservative for busy machines
 #           speedFactor = 1;
 #         }