Use ha.pool.sks-keyservers.net instead of p80.
Use ha.pool.sks-keyservers.net instead of p80.

Apparently the p80 is a subset of the pool that is available on port 80, while
ha is the larger pool and should be more generally available.

https://askubuntu.com/questions/720517/key-server-times-out-while-installing-docker-on-ubuntu-14-04

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