ae e280c01379 Restore Ethernet-within-IP Encapsulation support that was broken after
r273087. Move all checks from gif_output() into gif_transmit(). Previously
they were checked always, because if_start always called gif_output.
Now gif_transmit() can be called directly from if_bridge() code and we need
do checks here.

PR:		196646
MFC after:	1 week
2015-01-10 08:28:50 +00:00
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