fix the issue when link alias has the same prefix
fix the issue when link alias has the same prefix

rogervaas/haproxy,DonSchenck/haproxy,sandcastle/haproxy,petchat/haproxy,ytc301/haproxy-1,RoyZeng/haproxy,petchat/haproxy,RoyZeng/haproxy,sandcastle/haproxy,soumentrivedi/haproxy,secondrotation/haproxy,mehulsbhatt/haproxy-1,kevinsimper/haproxy,bing6/haproxy,soumentrivedi/haproxy,rogervaas/haproxy,ytc301/haproxy-1,mehulsbhatt/haproxy-1,DonSchenck/haproxy,secondrotation/haproxy,kevinsimper/haproxy,bing6/haproxy