Crankier server

[staff0rd]

Alternate solution for #9264, Crankier now includes the server itself, call it using the server command, and then point another instance of Crankier at it with the usual local command;

$ dotnet run -- server

Process ID: 4837
Hosting environment: Production
Content root path: /Users/staffordwilliams/git/aspnetcore/artifacts/bin/Crankier/Debug/netcoreapp3.0/
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
[00:00:00] Current: 412, peak: 412, connected: 236, disconnected: 0, rate: 236/s
[00:00:01] Current: 632, peak: 632, connected: 220, disconnected: 0, rate: 220/s
[00:00:02] Current: 851, peak: 851, connected: 219, disconnected: 0, rate: 219/s
[00:00:03] Current: 1087, peak: 1087, connected: 236, disconnected: 0, rate: 236/s
[00:00:04] Current: 1329, peak: 1329, connected: 242, disconnected: 0, rate: 242/s
[00:00:05] Current: 1568, peak: 1568, connected: 239, disconnected: 0, rate: 239/s
[00:00:06] Current: 1772, peak: 1772, connected: 204, disconnected: 0, rate: 204/s

Also, rather than spamming based on connection count, a hosted service now periodically echoes the output.

[BrennanConroy]

Looks good, could you add the copyright header to all the new files?

[staff0rd]

done

[halter73]

/azp run AspNetCore-ci

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[halter73]

This is awesome! Approved pending nits.

[staff0rd]

@halter73 i'll fix the threading stuff this evening. Regarding whitespace & brackets, why not lint for this in CI?

[staff0rd]

requested changes are done

[staff0rd]

updates made

[halter73]

Thanks @staff0rd!