feat: pass connection options to socket.io-adapter-mongo

src/database/mongo.js

@@ -168,7 +168,7 @@ mongoModule.close = function (callback) {
 
 mongoModule.socketAdapter = function () {
 	const mongoAdapter = require('@nodebb/socket.io-adapter-mongo');
-	return mongoAdapter(connection.getConnectionString());
+	return mongoAdapter(connection.getConnectionString(), connection.getConnectionOptions());
 };
 
 require('./mongo/main')(mongoModule);