Add queue stat record. I have to look up what the
redid url looks like to fix the spec.
Log down the redis url with the number of dropped
count.
The URL seems to be a iolist, so there should be
no need to format it into a URL for ease of 
printing. See `redis_sort/1` in `logplex_shard`.
Use the correct device.
Move the redis_url to the state.
Update the State.
Since the module has been reloaded at this time
I need to match on the dict by element and go
from there.
Add rollback code change.
Upgrade script for both up- and downgrades from-
and to v69.12.
Fixed the rollback back to 69.11.
Merge pull request #67 from heroku/redis_buffer_shard_key

Redis buffer shard key