Note about urls in upgrade docs

docs/source/Setup/Installation-Upgrade.md

@@ -1,13 +1,13 @@
 # Upgrading an existing installation
 
-## Evennia v0.9.5 to  1.0
+## Evennia v0.9.5 to 1.0
 
 Prior to 1.0, all Evennia installs were [Git-installs](./Installation-Git.md). These instructions
 assume that you have a cloned `evennia` repo and use a virtualenv (best practices).
 
 - Make sure to stop Evennia 0.9.5 entirely with `evennia stop`.
 - `deactivate` to leave your active virtualenv.
-- Make a _backup_ of your entire `mygame` folder, just to be sure! 
+- Make a _backup_ of your entire `mygame` folder, just to be sure!
 - Delete the old `evenv` folder, or rename it (in case you want to keep using 0.9.5 for a while).
 - Install Python 3.10 (recommended) or 3.9. Follow the [Git-installation](./Installation-Git.md) for your OS if needed.
 - If using virtualenv, make a _new_ one with `python3.10 -m venv evenv`, then activate with `source evenv/bin/activate`
@@ -15,28 +15,31 @@ assume that you have a cloned `evennia` repo and use a virtualenv (best practice
 - `cd` into your `evennia/` folder (you want to see the `docs/`, `bin/` directories as well as a nested `evennia/` folder)
 - **Prior to 1.0 release only** - do `git checkout develop` to switch to the develop branch. After release, this will
   be found on the default master branch.
-- `git pull` 
+- `git pull`
 - `pip install -e .`
 - If you want the optional extra libs, do `pip install -r requirements_extra.txt`.
 - Test that you can run the `evennia` command.
 
-If you don't have anything you want to keep in your existing game dir, you can just start a new onew 
-using the normal [install instructions](./Installation.md). If you want to keep/convert your existing 
+If you don't have anything you want to keep in your existing game dir, you can just start a new onew
+using the normal [install instructions](./Installation.md). If you want to keep/convert your existing
 game dir, continue below.
 
 - First, make a backup of your exising game dir! If you use version control, make sure to commit your current state.
 - `cd` to your existing 0.9.5-based game folder (like `mygame`.)
-- If you have changed `mygame/web`, _rename_ the folder to `web_0.9.5`. If you didn't change anything (or don't have 
+- If you have changed `mygame/web`, _rename_ the folder to `web_0.9.5`. If you didn't change anything (or don't have
 anything you want to keep), you can _delete_ it entirely.
 - Copy `evennia/evennia/game_template/web` to `mygame/` (e.g. using `cp -Rf` or a file manager). This new `web` folder
 replaces the old one and has a very different structure.
-- `evennia migrate`
-- `evennia start`
+- It's possible you need to replace/comment out import and calls to the deprecated
+[`django.conf.urls`](https://docs.djangoproject.com/en/3.2/ref/urls/#url). The new way to call it is
+[available here](https://docs.djangoproject.com/en/4.0/ref/urls/#django.urls.re_path).
+- Run `evennia migrate`
+- Run `evennia start`
 
-If you made extensive work in your game dir, you may well find that you need to do some (hopefully minor) 
-changes to your code before it will start with Evennia 1.0. Some important points: 
+If you made extensive work in your game dir, you may well find that you need to do some (hopefully minor)
+changes to your code before it will start with Evennia 1.0. Some important points:
 
-- The `evennia/contrib/` folder changed structure - there are now categorized sub-folders, so you have to update 
+- The `evennia/contrib/` folder changed structure - there are now categorized sub-folders, so you have to update
 your imports.
 - Any `web` changes need to be moved back from your backup into the new structure of `web/` manually.
-- See the [Evennia 1.0 Changelog](../Coding/Changelog.md) for all changes.
+- See the [Evennia 1.0 Changelog](../Coding/Changelog.md) for all changes.