mod_http_muc_log: Fix exception on lack of trailing slash in room path A request to /room leads to the match call returning nil which in turn calls nodeprep(nil). In Prosody 0.11.x this does nothing and simply returns the nil, while in 0.12 it is an error. Now it redirects to the calendar view at /room/ - even for non-existant rooms. Discovered at a deployment with http_paths = { muc_log = "/" } and requests to /robots.txt and similar, which now result in a uses redirect before returning 404.

--- a/mod_http_muc_log/mod_http_muc_log.lua	Mon Apr 18 23:02:04 2022 +0200
+++ b/mod_http_muc_log/mod_http_muc_log.lua	Fri Apr 22 14:29:32 2022 +0200
@@ -275,6 +275,10 @@
 	local request, response = event.request, event.response;
 
 	local room, date = path:match("^([^/]+)/([^/]*)/?$");
+	if not room then
+		response.headers.location = url.build({ path = path .. "/" });
+		return 303;
+	end
 	room = nodeprep(room);
 	if not room then
 		return 400;