1TODO:
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3- Upgrade to libssh2 v1.9
4- Refactor SshChannel (at least getters and putters)
5- Override libssh2 send and recv callbacks to do raw sends/recvs with U++ TcpSocket.
6- Accordingly, move Ssh::Wait() to SshSession.
7- Write a tutorial based on SshBasics example.
8