add migration warning for PHP frontend removal

diff --git a/docs/admin/Migration.md b/docs/admin/Migration.md
index b407d2ef3938c405a51c002f850d4cd15ca7e5b3..17019da4c37da32b29f5ecdbc51f7289abe887be 100644 (file)
--- a/docs/admin/Migration.md
+++ b/docs/admin/Migration.md
@@ -20,6 +20,18 @@ breaking changes. **Please read them before running the migration.**
     If you are migrating from a version <3.6, then you still have to follow
     the manual migration steps up to 3.6.
 
+## 4.5.0 -> master
+
+### PHP frontend removed
+
+The PHP frontend has been completely removed. Please switch to the Python
+frontend.
+
+Without the PHP code, the `nominatim refresh --website` command is no longer
+needed. It currently omits a warning and does otherwise nothing. It will be
+removed in later versions of Nominatim. So make sure you remove it from your
+scripts.
+
 ## 4.4.0 -> 4.5.0
 
 ### New structure for Python packages