freerdp_peer->Disconnect calls BIO_free which then calls close on the
underlying file descriptor.
Then when freerdp_peer_free is called, the file descriptor is closed
again.
This is problematic if the file descriptor is recycled in between:
thread 1: freerdp_peer_new(42);
thread 1: freerdp_peer->Disconnect() closes 42
thread 2: opens a file with fd 42
thread 1: freerdp_peer_free closes 42
thread 2: uses closed file descriptor 42
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