unbreak CORS on /capabilities.

fixes https://github.com/vector-im/element-web/issues/15297

clientapi/routing/routing.go

@@ -793,7 +793,7 @@ func Setup(
 			}
 			return GetCapabilities(req, rsAPI)
 		}),
-	).Methods(http.MethodGet)
+	).Methods(http.MethodGet, http.MethodOptions)
 
 	// Supplying a device ID is deprecated.
 	r0mux.Handle("/keys/upload/{deviceID}",

go.mod

@@ -1,5 +1,7 @@
 module github.com/matrix-org/dendrite
 
+replace github.com/matrix-org/gomatrixserverlib => ../gomatrixserverlib
+
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/Shopify/sarama v1.27.0

syncapi/routing/messages.go

@@ -179,7 +179,7 @@ func OnIncomingMessagesRequest(
 	}
 }
 
-// retrieveEvents retrieve events from the local database for a request on
+// retrieveEvents retrieves events from the local database for a request on
 // /messages. If there's not enough events to retrieve, it asks another
 // homeserver in the room for older events.
 // Returns an error if there was an issue talking to the database or with the