git: Sync the kenv(1) utility with FreeBSD.

[Sascha Wildner]

commit 5b8e8af5d21404d5a642e0768881d6814910c134
Author: Sascha Wildner <saw at online.de>
Date:   Sat Mar 19 21:51:42 2016 +0100

    Sync the kenv(1) utility with FreeBSD.
    
    Some new options and it uses the kenv() system call now.

Summary of changes:
 usr.bin/kenv/Makefile |   3 +-
 usr.bin/kenv/kenv.1   |  68 +++++++++++++++--
 usr.bin/kenv/kenv.c   | 203 ++++++++++++++++++++++++++++++++++----------------
 3 files changed, 202 insertions(+), 72 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5b8e8af5d21404d5a642e0768881d6814910c134


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