Fix upstream regression.

Update port with libssh 0.10.6.

Update port with libssh 0.10.5.

Arduino CLI fix FTBFS.

Update port with libssh 0.10.4.

2.0.2 support.

2.0.0 and C3 support.

Performance improvement.

Update port with libssh commit 76b7e0e9.

PlatformIO fix FTBFS.