This has been submitted upstream as well.

See-also: !817

This reverts a change in musl 1.2.2 that causes realpath(3) to return
"//" for "//" instead of "/".  This does not conform to any other OS
behaviour other than z/OS.

Upstream is still considering which behaviour is correct.

Fixes: #446
Upstream-URL: https://www.openwall.com/lists/musl/2021/01/13/1


Suggested-by: Samuel Holland <samuel@sholland.org>
Acked-by: Zach van Rijn <me@zv.io>

https://www.openwall.com/lists/musl/2020/05/22/10

https://www.openwall.com/lists/oss-security/2019/08/06/1

'If we only have a few hours between writing and shipping,
we are well and truly doomed.'  --laura@, Netscape