Similar to O.N.G.E.K.I. and CHUNITHM, with the caveat that the obfuscated endpoint is created using `md5(endpoint + salt)` instead of using PBKDF2 like other games.
Tested and confirmed working on FESTiVAL+.
The current implementation is also affected by #129, so I'm open to ideas.
Reviewed-on: https://gitea.tendokyu.moe/Hay1tsme/artemis/pulls/130
Co-authored-by: beerpsi <beerpsi@duck.com>
Co-committed-by: beerpsi <beerpsi@duck.com>
