Different config between doc and code for limits config

[mizeng]

Describe the bug
Seems there're quite a few difference of limits config between config doc and real code.
e.g. https://github.com/grafana/loki/tree/master/docs/configuration#limits_config vs https://github.com/grafana/loki/blob/master/pkg/util/validation/limits.go#L15-L40

Take ** ingestion_rate** as an example, I can not find it in the code at all. Instead, there's one named "ingestion_rate_mb". Do I miss something?

[eminden]

I hit the same one (ingestion-rate-limit-mb vs ingestion-rate) right now.

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[pstibrany]

This seems to have been fixed by #1278

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 30 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.