netutil: don't resolve unix socket URLs when comparing URLs
netutil: don't resolve unix socket URLs when comparing URLs

Was causing VerifyBootstrap() to hang on unix peers.

glevand/coreos--etcd,sebrandon1/etcd,dannysauer/etcd,coreos/etcd,bdarnell/etcd,vimalk78/etcd,li-ang/etcd,etcd-io/etcd,heyitsanthony/etcd,ajityagaty/etcd,cockroachdb/etcd,xiang90/etcd,visheshnp/etcd,bdarnell/etcd,mickep76/etcd,a-robinson/etcd,coreos/etcd,rnaveiras/etcd,fanminshi/etcd,gyuho/etcd,gyuho/etcd,fanminshi/etcd,YuleiXiao/etcd,joshix/etcd,sinsharat/etcd,whuwxl/etcd,bluebreezecf/etcd,mkumatag/etcd,cockroachdb/etcd,mkumatag/etcd,bluebreezecf/etcd,sinsharat/etcd,vimalk78/etcd,lorneli/etcd,ajityagaty/etcd,li-ang/etcd,dannysauer/etcd,ajityagaty/etcd,heyitsanthony/etcd,mqliang/etcd,rnaveiras/etcd,mqliang/etcd,YuleiXiao/etcd,akauppi/etcd,whuwxl/etcd,mickep76/etcd,mqliang/etcd,sebrandon1/etcd,lorneli/etcd,etcd-io/etcd,joshix/etcd,xiang90/etcd,akauppi/etcd,glevand/coreos--etcd,visheshnp/etcd,mkumatag/etcd,etcd-io/etcd,rnaveiras/etcd,a-robinson/etcd