git: ifmedia: Add two helper functions for ifmedia_add and ifmedia_set

[Sepherosa Ziehau]

commit 38c053eecdc3700db87b0324f84da2a06f2385c8
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Thu Dec 3 10:48:03 2015 +0800

    ifmedia: Add two helper functions for ifmedia_add and ifmedia_set
    
    - ifmedia_add_nodup() will not add duplicated media into ifmedia
    - ifmedia_tryset() will fail, if the target media does not exist

Summary of changes:
 sys/net/if_media.c | 27 +++++++++++++++++++++++++--
 sys/net/if_media.h |  2 ++
 2 files changed, 27 insertions(+), 2 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/38c053eecdc3700db87b0324f84da2a06f2385c8


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