There may be problems with best ingest

[tyiki-badwell]

When we specify auto for ingest_hostname, the API goes to access
https://mixer.com/api/v1/ingests/best
and the following message is returned in the HTTP header.

x-warning: Calls must be updated to include a Client-ID header by May 21st. See more: https://aka.ms/MixerDevIdentification

When it is unknown when May 21st, we need to know if we have to respond.