When cloning a directory with symbolic links that contain .. on Windows, the .. segments are silently discarded, resulting in a broken symlink.

Note that this was recently changed in #5355. cc @pks-t

Reproduction steps

1. Create a repository with a file symbolic link between directories. For example:
   • echo contents > foo
   • mkdir somedir
   • mklink somedir\foo ..\foo
   • Init a repo, and add these two files
2. Have a libgit2 project which will clone the sample repo.
3. Notice that the resulting symlink is "foo -> foo"

Expected behavior

.. should be preserved in the symlink.

Actual behavior

.. is removed from symlink.

Version of libgit2 (release number or SHA1)

1722390

Operating system(s) tested

Windows 10