Use sysfs to set hairpin mode
Use sysfs to set hairpin mode

Set the hairpin mode using the sysfs interface which
looks like it is working all the way to the oldest
of RHEL6.6 kernels.

Signed-off-by: Jana Radhakrishnan <045898bda7d4800fe4909a9831e702ab79e266be@docker.com>

msabansal/libnetwork,anarcher/libnetwork,mountkin/libnetwork,vdemeester/libnetwork,curtiszimmerman/libnetwork,sainath14/libnetwork,amitkris/libnetwork,medallia/libnetwork,mahak/libnetwork,cpuguy83/libnetwork,msabansal/libnetwork,abronan/libnetwork,junxu/libnetwork,cloudflare/libnetwork,msagheer/libnetwork,anortef/libnetwork,tmakita/libnetwork,tgraf/libnetwork,carlye566/libnetwork_eric,sanimej/libnetwork,jvinod/libnetwork,mbanikazemi/libnetwork,medallia/libnetwork,medallia/libnetwork,pyakpyak/libnetwork,runcom/libnetwork,msagheer/libnetwork,aboch/libnetwork_new,curtiszimmerman/libnetwork,YujiOshima/libnetwork,abhi/libnetwork,hw-qiaolei/libnetwork,jimmycmh/libnetwork,thockin/libnetwork,mYmNeo/libnetwork,kolyshkin/libnetwork,hw-qiaolei/libnetwork,mapuri/libnetwork,clnperez/libnetwork,mYmNeo/libnetwork,wcwxyz/libnetwork,mavenugo/libnetwork,tangkun75/libnetwork,junxu/libnetwork,tmakita/libnetwork,fcrisciani/libnetwork,vdemeester/libnetwork,sainath14/libnetwork,sharmasushant/libnetwork,mavenugo/libnetwork,tangkun75/libnetwork,fcrisciani/libnetwork,hackersdotmu/libnetwork,minhoryang/libnetwork,tgraf/libnetwork,bprashanth/libnetwork,frntn/libnetwork,wulonghui/libnetwork,thockin/libnetwork,anortef/libnetwork,jvinod/libnetwork,mountkin/libnetwork,amitkris/libnetwork,aboch/libnetwork_new,docker/libnetwork,rogaha/libnetwork,anshulr/libnetwork,mahak/libnetwork,clnperez/libnetwork,YujiOshima/libnetwork,allencloud/libnetwork,sanimej/libnetwork,vdemeester/libnetwork,WeiZhang555/libnetwork,carlye566/libnetwork,anarcher/libnetwork,jmzwcn/libnetwork,carlye566/libnetwork_eric,kunalkushwaha/libnetwork,wcwxyz/libnetwork,abhi/libnetwork,AdoHe/libnetwork,abronan/libnetwork,coolljt0725/libnetwork,argvader/libnetwork,AdoHe/libnetwork,kunalkushwaha/libnetwork,axsh/libnetwork,sharmasushant/libnetwork,brahmaroutu/libnetwork,lindenlab/libnetwork,bprashanth/libnetwork,ityangchen/libnetwork,anshulr/libnetwork,minhoryang/libnetwork,ityangchen/libnetwork,runcom/libnetwork,allencloud/libnetwork,WeiZhang555/libnetwork,jimmycmh/libnetwork,mbanikazemi/libnetwork,lindenlab/libnetwork,pyakpyak/libnetwork,kolyshkin/libnetwork,mapuri/libnetwork,docker/libnetwork,jmzwcn/libnetwork,wulonghui/libnetwork,mahak/libnetwork,abhi/libnetwork,carlye566/libnetwork,kolyshkin/libnetwork,hackersdotmu/libnetwork,axsh/libnetwork,rogaha/libnetwork,cpuguy83/libnetwork,brahmaroutu/libnetwork,argvader/libnetwork,frntn/libnetwork,docker/libnetwork,coolljt0725/libnetwork,cloudflare/libnetwork