v1.16.1

1.Fixed application setting user[userid=0] as last_update_staff when nobody updated the application
2.Fixed config update corruption due to multiple workers
3.Fixed PATCH /user/discord that removes account when old_discord_id = new_discord_id
4.Fixed PUT /user/ban always using "Unknown User" in audit log
5.Removed bot_application_received message
6.Removed PUT /config/reset endpoint
7.Added MFA support to PATCH, DELETE /token/application, DELETE /user/password
8.Tightened rate-limit of GET /member/banner to 2r/10s (from 30r/180s), also lowered bannergen workers to 3
9.Improved rate-limiter, added 10-minute ban for IPs surpassing 150r/m