Update Sources/Subs-Members.php
Update Sources/Subs-Members.php

- for logging purposes replacement of illegal chars to "?" is only necessary

Signed-off-by: Underdog-01 <1db25f2882fc57361efdb0f5a641ce8639efaed5@gmail.com>

StealthWombat/SMF2.1-more-forkery,StealthWombat/SMF2.1-more-forkery