zstandard for compression

[snaggen]

It would be nice to have more efficient compression algorithms to choose from, like zstd.
Sometimes the log files grow to very large sizes, and I have seen zstd provide 10x improvements in size over gzip, so it would be a real benefit to avoid filling up the log partitions.

There are libraries like https://github.com/airlift/aircompressor that should make it a bit easier to add compression algorithms.