bug#28156: Emacs quietly munges symlink contents

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sun, 20 Aug 2017 15:09:01 +0000
> Cc: michael.albinus@gmx.de, 28156@debbugs.gnu.org
> 
> It makes it impossible to use '~' as a directory name. Higher-level 
> interactive interfaces such as Shell and
> Dired can live with such a restriction, but library APIs need to be able to 
> work with arbitrary inputs.

We have quoting for these cases.

> Callers of `make-symbolic-link' will need to expand the target themselves. 

make-symbolic-link is an interactive command, not just a function.