There was recent discussion in some reviews about fixing
latent bugs in the legacy v2.0 API code. Since the
v2.0 API is deprecated and v2.1 is the default since Liberty,
we shouldn't need to fix latent low-priority bugs in v2.0
anymore.
However, we'll still fix critical bugs, and we shouldn't
knowingly introduce new regressions that would result
in a 500 response.
Change-Id: I9937d9226a99754dadcc48d599090296f5ae01f7