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note whether its a library, stand-alone client/server, or both
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mention SSH v1 support (I guess not supporting it could be counted as a feature these days... or at least it is important that one can disable it)
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In the comparison tables, display how many impls per proto / protos per implicit=false there are.
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Distinguish clients and servers in comparison; perhaps offer separate comparison pages for clients, servers, and combined...?