packet lib: update icmpv6 doc
packet lib: update icmpv6 doc

Signed-off-by: Ygor Amaral <bb26de9a151c65050862183adbad164142744b57@cin.ufpe.br>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

jazzmes/ryu,alanquillin/ryu,Tesi-Luca-Davide/ryu,openvapour/ryu,fujita/ryu,jkoelker/ryu,ynkjm/ryu,yamt/ryu,muzixing/ryu,evanscottgray/ryu,StephenKing/summerschool-2015-ryu,diogommartins/ryu,openvapour/ryu,muzixing/ryu,unifycore/ryu,Tejas-Subramanya/RYU_MEC,pichuang/ryu,ntts-clo/mld-ryu,osrg/ryu,StephenKing/ryu,darjus-amzn/ryu,hisaharu/ryu,torufuru/OFPatchPanel,lsqtongxin/ryu,elahejalalpour/ELRyu,yamt/ryu,lsqtongxin/ryu,ttsubo/ryu,alyosha1879/ryu,unifycore/ryu,takahashiminoru/ryu,ntts-clo/ryu,gopchandani/ryu,StephenKing/summerschool-2015-ryu,ttsubo/ryu,shinpeimuraoka/ryu,haniehrajabi/ryu,pichuang/ryu,lagopus/ryu-lagopus-ext,pichuang/ryu,muzixing/ryu,diogommartins/ryu,jkoelker/ryu,shinpeimuraoka/ryu,StephenKing/ryu,StephenKing/summerschool-2015-ryu,gareging/SDN_Framework,zangree/ryu,ynkjm/ryu,citrix-openstack/build-ryu,takahashiminoru/ryu,diogommartins/ryu,zyq001/ryu,gareging/SDN_Framework,osrg/ryu,umkcdcrg01/ryu_openflow,ysywh/ryu,iwaseyusuke/ryu,Tejas-Subramanya/RYU_MEC,lzppp/mylearning,StephenKing/summerschool-2015-ryu,OpenState-SDN/ryu,jazzmes/ryu,fkakuma/ryu,gopchandani/ryu,StephenKing/summerschool-2015-ryu,jalilm/ryu,ysywh/ryu,ynkjm/ryu,o3project/ryu-oe,lsqtongxin/ryu,sivaramakrishnansr/ryu,gareging/SDN_Framework,alanquillin/ryu,fkakuma/ryu,zyq001/ryu,fkakuma/ryu,Zouyiran/ryu,Zouyiran/ryu,ysywh/ryu,pichuang/ryu,darjus-amzn/ryu,evanscottgray/ryu,jkoelker/ryu,hisaharu/ryu,yamada-h/ryu,lzppp/mylearning,osrg/ryu,habibiefaried/ryu,John-Lin/ryu,sivaramakrishnansr/ryu,John-Lin/ryu,jalilm/ryu,hisaharu/ryu,StephenKing/ryu,OpenState-SDN/ryu,iwaseyusuke/ryu,openvapour/ryu,Tesi-Luca-Davide/ryu,Tesi-Luca-Davide/ryu,iwaseyusuke/ryu,fujita/ryu,takahashiminoru/ryu,openvapour/ryu,hisaharu/ryu,habibiefaried/ryu,darjus-amzn/ryu,iwaseyusuke/ryu,ttsubo/ryu,ynkjm/ryu,habibiefaried/ryu,umkcdcrg01/ryu_openflow,sivaramakrishnansr/ryu,zyq001/ryu,umkcdcrg01/ryu_openflow,Zouyiran/ryu,TakeshiTseng/ryu,TakeshiTseng/ryu,zangree/ryu,TakeshiTseng/ryu,zangree/ryu,castroflavio/ryu,mikhaelharswanto/ryu,zangree/ryu,takahashiminoru/ryu,zyq001/ryu,alanquillin/ryu,TakeshiTseng/ryu,fujita/ryu,fujita/ryu,citrix-openstack-build/ryu,lzppp/mylearning,mikhaelharswanto/ryu,alyosha1879/ryu,lagopus/ryu-lagopus-ext,zyq001/ryu,torufuru/OFPatchPanel,jazzmes/ryu,lzppp/mylearning,haniehrajabi/ryu,Tejas-Subramanya/RYU_MEC,John-Lin/ryu,yamada-h/ryu,alanquillin/ryu,habibiefaried/ryu,jalilm/ryu,shinpeimuraoka/ryu,muzixing/ryu,StephenKing/ryu,gareging/SDN_Framework,diogommartins/ryu,Tesi-Luca-Davide/ryu,takahashiminoru/ryu,Tesi-Luca-Davide/ryu,gopchandani/ryu,darjus-amzn/ryu,lagopus/ryu-lagopus-ext,elahejalalpour/ELRyu,TakeshiTseng/ryu,elahejalalpour/ELRyu,fujita/ryu,Tejas-Subramanya/RYU_MEC,zangree/ryu,diogommartins/ryu,shinpeimuraoka/ryu,torufuru/oolhackathon,habibiefaried/ryu,haniehrajabi/ryu,John-Lin/ryu,ttsubo/ryu,umkcdcrg01/ryu_openflow,citrix-openstack/build-ryu,citrix-openstack-build/ryu,lsqtongxin/ryu,OpenState-SDN/ryu,John-Lin/ryu,elahejalalpour/ELRyu,gopchandani/ryu,jalilm/ryu,sivaramakrishnansr/ryu,openvapour/ryu,alyosha1879/ryu,yamt/ryu,o3project/ryu-oe,yamt/ryu,lagopus/ryu-lagopus-ext,fkakuma/ryu,torufuru/oolhackathon,lzppp/mylearning,umkcdcrg01/ryu_openflow,OpenState-SDN/ryu,castroflavio/ryu,ttsubo/ryu,osrg/ryu,elahejalalpour/ELRyu,yamt/ryu,evanscottgray/ryu,Tejas-Subramanya/RYU_MEC,Zouyiran/ryu,sivaramakrishnansr/ryu,OpenState-SDN/ryu,ysywh/ryu,pichuang/ryu,iwaseyusuke/ryu,ynkjm/ryu,ntts-clo/mld-ryu,lsqtongxin/ryu,haniehrajabi/ryu,ysywh/ryu,darjus-amzn/ryu,muzixing/ryu,ntts-clo/ryu,torufuru/oolhackathon,alyosha1879/ryu,hisaharu/ryu,fkakuma/ryu,haniehrajabi/ryu,alanquillin/ryu,osrg/ryu,gareging/SDN_Framework,Zouyiran/ryu,shinpeimuraoka/ryu,castroflavio/ryu,StephenKing/ryu,jalilm/ryu,gopchandani/ryu,lagopus/ryu-lagopus-ext