Update old docs and domain

[barsikus007]

Domain https://authserver.mojang.com/ don't works anymore:

• Remove authserver.mojang.com ping PrismLauncher/PrismLauncher#2470
• https://check-host.net/check-report/2278cffckaaf
• I got twisted.internet.error.DNSLookupError: DNS lookup failed: no results for hostname lookup: authserver.mojang.com. error on login

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Imports like from quarry.auth import Profile (link) are outdated (and changelog too)

NameError: name 'ClientFactory' is not defined