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gx publish 2.0.24

gx publish 2.0.22

allocate a reusable buffer for validating MACs

It turns out this was a pretty large source of allocations (by number). We might
as well just reuse the same buffer over and over.

switch to the buffer-pool package

The API is significantly cleaner and safer.

update gogo protobuf

and regenerate the protobufs with gogo faster