Maybe a note in Geany's NEWS is enough? something like
```diff
@@ -3,6 +3,10 @@ Geany 1.30 (unreleased)
Internationalization
* Updated translations: lt
+ API
+ * Remove unprefixed Scintilla structure aliases. Plugins must use
+ the `Sci_`-prefixed version from now on.
+
Geany 1.29 (November 13, 2016)
```-- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/geany/geany-plugins/pull/510#issuecomment-266196983
