comp-lzo option deprecated

[alanmcg]

The server option comp-lzo is deprecated in favor of --compression

--compress [algorithm]
Enable a compression algorithm.

The algorithm parameter may be "lzo", "lz4", or empty. LZO and LZ4 are different compression algorithms, with LZ4 generally offering the best performance with least CPU usage. For backwards compatibility with OpenVPN versions before v2.4, use "lzo" (which is identical to the older option "--comp-lzo yes").

If the algorithm parameter is empty, compression will be turned off, but the packet framing for compression will still be enabled, allowing a different setting to be pushed later. 

[alanmcg]

Should deprecated features be supported? I was going to remove comp-lzo and replace it with this option but then I consider we could have both options instead..