git: igb.4: Update year.

[Sepherosa Ziehau]

commit c62fbeb81b0556dfce7ac3e7116091d202e47f43
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Wed May 24 17:37:43 2017 +0800

    igb.4: Update year.

Summary of changes:
 share/man/man4/igb.4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c62fbeb81b0556dfce7ac3e7116091d202e47f43


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