fix: remove duplicate query parameters on HTTPS redirect (#6460)

HTTPS redirection rebuilds the full URL using req.originalUrl, which
includes query parameters (see
https://expressjs.com/en/api.html#req.originalUrl). Prior to this patch,
appending the stringified query params to req.originalUrl resulted in
duplicate parameters, e.g.
wiki.js/callback?session=123&code=abc?session=123&code=abc
which caused errors when being redirected from an insecure (http://)
callback URL to a secure version when using OIDC (e.g. with keycloak).

This issue is probably rare, but in cases where HTTPS redirection is
enabled and a user tries to hit an insecure URL with query parameters,
it could cause problems.

server/controllers/ssl.js

@@ -28,8 +28,7 @@ router.get('/.well-known/acme-challenge/:token', (req, res, next) => {
  */
 router.all('/*', (req, res, next) => {
   if (WIKI.config.server.sslRedir && !req.secure && WIKI.servers.servers.https) {
-    let query = (!_.isEmpty(req.query)) ? `?${qs.stringify(req.query)}` : ``
+    return res.redirect(`https://${req.hostname}${req.originalUrl}`)
-    return res.redirect(`https://${req.hostname}${req.originalUrl}${query}`)
   } else {
     next()
   }