[New msys2-runtime version] symlink_native: allow linking to .. #5691
Description
symlink_native: allow linking to `..`
When running
CYGWIN=winsymlinks:nativestrict ln -s .. abc
the counter-intuitive result is _not_ a symbolic link to `..`, but
instead to `../../$(basename "$PWD")`.
The reason for this is that the search for the longest common prefix
assumes that the link target is not a strict prefix of the parent
directory of the link itself.
Let's fix that.
Signed-off-by: Johannes Schindelin <[email protected]>