git: libc: Add a clearenv() function.

[Sascha Wildner]

commit 7307c47676255189131ef8c0756ab8f61836c585
Author: Sascha Wildner <saw at online.de>
Date:   Thu Dec 23 18:33:17 2021 +0100

    libc: Add a clearenv() function.
    
    Seems useful for dports, as pointed out by zrj.
    
    Taken-from: FreeBSD

Summary of changes:
 include/stdlib.h             |  1 +
 lib/libc/stdlib/Makefile.inc |  3 ++-
 lib/libc/stdlib/Symbol.map   |  4 ++++
 lib/libc/stdlib/getenv.3     | 22 ++++++++++++++++++++--
 lib/libc/stdlib/getenv.c     | 25 +++++++++++++++++++++++++
 5 files changed, 52 insertions(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/7307c47676255189131ef8c0756ab8f61836c585


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