This repository has two problems:

• It does not fork the upstream repository of libssh. I guess this is because the latest and greatest code state is not on GitHub but here. All mirrors of this repository I have seen on GitHub lagged behind. So that might be okay.
• Nevertheless, replacing this repository by the upstream repository and applying the few custom patches, breaks compilation of ClickHouse. This means that code was modified or deleted when this repository was originally created (possibly because it was done in a hurry or in the scope of student coursework). This makes maintenance harder, so we should start over with a fresh clone from upstream, and provide all custom patches as PRs on top.