Extra '/' in 2FA urls
Concerned version
Version: 2.16.1
Summary
Some 2FA registration URLs have an extra "/" such as:
- Auto redirection from /2fregisters to //2fregisters/totp when TOTP is the only available 2FA type
- XHR to //2fregisters/totp/getkey to generate qrcode
This can cause trouble with some WAF who don't like double slashes, and it's inelegant