Document quota caching flags (#825)
Document quota caching flags (#825)

* Document quota caching flags

* Review comments

RJPercival/trillian,google/trillian,daviddrysdale/trillian,gdbelvin/trillian,AlCutter/trillian,codingllama/trillian,gdbelvin/trillian,Martin2112/trillian,daviddrysdale/trillian,daviddrysdale/trillian,google/trillian,RJPercival/trillian,gdbelvin/trillian,Martin2112/trillian,Martin2112/trillian,AlCutter/trillian,codingllama/trillian