pkg/pathutil: change copyright for path.go
pkg/pathutil: change copyright for path.go

The file only contains the function that is borrowed from std http lib,
so we use their copyright.

qqsun8819/etcd,jlamillan/etcd,xiang90/etcd,rnaveiras/etcd,jeremyeder/etcd,whuwxl/etcd,mickep76/etcd,sinsharat/etcd,linuxcer/etcd,mkumatag/etcd,arthurcolle/etcd,endocode/etcd,chenbaihu/etcd,hroyrh/etcd,betawaffle/etcd,cognusion/etcd,lorneli/etcd,mqliang/etcd,honeyqa/etcd,linuxcer/etcd,jchauncey/etcd,raoofm/etcd,handsomesun/etcd,ravigadde/etcd,xdlinear/etcd,ktateish/etcd,yudai/etcd,Winslett/etcd,joshix/etcd,sinsharat/etcd,snailwalker/etcd,mqliang/etcd,jonboulle/etcd,lzbgt/etcd,dannysauer/etcd,yichengq/etcd,dnaeon/etcd,msanterre/etcd,xiang90/etcd,lumjjb/etcd,glycerine/etcd,sofuture/etcd,zaphod-concur/etcd,glevand/coreos--etcd,SivagnanamCiena/etcd,giantswarm/etcd,chipironcin/etcd,raoofm/etcd,oscarrr110/etcd,CrazyJvm/etcd,betawaffle/etcd,hongbinz/etcd,buaazp/etcd,elimisteve/etcd,dannysauer/etcd,luxas/etcd,TheHippo/etcd,jlamillan/etcd,svdata/etcd,yyljlyy/etcd,fasaxc/etcd,hongbinz/etcd,gae123/etcd,dnaeon/etcd,lzbgt/etcd,sebrandon1/etcd,gityf/etcd,nekto0n/etcd,zaphod-concur/etcd,purpleidea/etcd,endocode/etcd,insequent/etcd,oscarrr110/etcd,ajityagaty/etcd,ajityagaty/etcd,fanminshi/etcd,westhood/etcd,vimalk78/etcd,asim/etcd,bluebreezecf/etcd,freeloop1114/etcd,fasaxc/etcd,gyuho/etcd,rchicoli/etcd,sebrandon1/etcd,handsomesun/etcd,OyTao/etcd_learning,ajityagaty/etcd,fgbreel/etcd,swingbach/etcd,pauldallen/etcd,wantonsolutions/dinv-etcd,svdata/etcd,achanda/etcd,njucslqq/etcd,visheshnp/etcd,combk8s/etcd,ravigadde/etcd,cognusion/etcd,combk8s/etcd,achanda/etcd,tempbottle/etcd,asim/etcd,li-ang/etcd,improbable-io/etcd,coreos/etcd,snailwalker/etcd,sofuture/etcd,cchamplin/etcd,spacejam/etcd,tguangch/etcd,iamqizhao/etcd,iamqizhao/etcd,gae123/etcd,tamird/etcd,a-robinson/etcd,glycerine/etcd,cockroachdb/etcd,bdarnell/etcd,freeloop1114/etcd,shakefu/etcd,swingbach/etcd,sayden/etcd,jefby/etcd,etcd-io/etcd,onlyjob/etcd,beni55/etcd,xdlinear/etcd,coreos/etcd,siddontang/etcd,shawnps/etcd,onlyjob/etcd,tguangch/etcd,fasaxc/etcd,gyuho/etcd,rnaveiras/etcd,xychu/etcd,honeyqa/etcd,chenbaihu/etcd,yyljlyy/etcd,jeremyeder/etcd,giantswarm/etcd,elimisteve/etcd,armstrongli/etcd,mike-lerch/etcd,OyTao/etcd_learning,cockroachdb/etcd,lorneli/etcd,fgbreel/etcd,plasticbox/etcd,sayden/etcd,joshix/etcd,spacejam/etcd,wowsoso/etcd,lumjjb/etcd,shawnps/etcd,buaazp/etcd,njucslqq/etcd,visheshnp/etcd,CrazyJvm/etcd,vimalk78/etcd,Eagle-X/etcd,pauldallen/etcd,ktateish/etcd,akauppi/etcd,HideoYamauchi/etcd,qqsun8819/etcd,etcd-io/etcd,a-robinson/etcd,hongchaodeng/etcd,heyitsanthony/etcd,yudai/etcd,imzhulei/etcd,fanminshi/etcd,Timer/etcd,hroyrh/etcd,beni55/etcd,mike-lerch/etcd,rnaveiras/etcd,insequent/etcd,cchamplin/etcd,kkaneda/etcd,whuwxl/etcd,hongchaodeng/etcd,armstrongli/etcd,YuleiXiao/etcd,mkumatag/etcd,luxas/etcd,akauppi/etcd,improbable-io/etcd,plasticbox/etcd,StorReduce/etcd,arthurcolle/etcd,etcd-io/etcd,Winslett/etcd,li-ang/etcd,mqliang/etcd,gouyang/etcd,gouyang/etcd,jchauncey/etcd,bdarnell/etcd,bluebreezecf/etcd,xychu/etcd,siddontang/etcd,TheHippo/etcd,delkyd/etcd,StorReduce/etcd,tamird/etcd,wowsoso/etcd,wantonsolutions/dinv-etcd,purpleidea/etcd,Yhgenomics/etcd,delkyd/etcd,mickep76/etcd,imzhulei/etcd,Eagle-X/etcd,yichengq/etcd,shakefu/etcd,HideoYamauchi/etcd,tempbottle/etcd,YuleiXiao/etcd,jonboulle/etcd,wantonsolutions/dinv-etcd,jefby/etcd,Yhgenomics/etcd,kkaneda/etcd,SivagnanamCiena/etcd,heyitsanthony/etcd,gityf/etcd,glevand/coreos--etcd,mkumatag/etcd,Timer/etcd,nekto0n/etcd,westhood/etcd,msanterre/etcd,chipironcin/etcd,rchicoli/etcd