datalad_next.patches.ssh_exec

Enable SSH-based remote command execution on Windows

This change introduces a replacement for core's datalad/support/sshconnector.py:BaseSSHConnection._exec_ssh() with a dedicated handling of stdin for Windows.

The OpenSSH client in Windows modifies its stdin-descriptor in such a way, that it becomes unusable for the python process, if the stdin-descriptor is shared between the python-process and the ssh-process. As a result, all read-operations that the python-process performs on stdin will block and leave the python-process "hanging".

This change passes an explicit, empty, byte-string as stdin to the SSH client call, in order to avoid any interaction of SSH with the parent process's stdin descriptor.