Add Zstd support to ContentCompressionExec.

[arturobernalg]

This update allows automatic selection of Zstd as a compression algorithm when available.

[garydgregory]

Why not do this through Commons Compress?

[arturobernalg]

Why not do this through Commons Compress?

In general keep it simple. Adding a direct dependency on the Zstd library is a straightforward way to enable ` 'Zstd' compression without the overhead of an additional module.

[ok2c]

@arturobernalg Zstd appears to be BSD Licensed. It should be compatible with ASLv2 but I am afraid this needs to be double-checked.

Why indeed not using Apache Compress if it provides compatible compression codec?

[garydgregory]

Hi all,

Commons Compress depends on the same lib BUT provides a facade API for all its archive and compressed file formats.

[ok2c]

Hi all,

Commons Compress depends on the same lib BUT provides a facade API for all its archive and compressed file formats.

@garydgregory Got it. Thank you.

[arturobernalg]

@arturobernalg Zstd appears to be BSD Licensed. It should be compatible with ASLv2 but I am afraid this needs to be double-checked.

Why indeed not using Apache Compress if it provides compatible compression codec?

Well, my initial approach was to directly integrate the Zstd library to provide a direct and potentially efficient solution. I see what i can do.

Thank you

[ok2c]

@arturobernalg Could you please change the target branch to master so I could delete obsolete 5.4.x?