gossip/resolver: simplify ensureHostPort
gossip/resolver: simplify ensureHostPort

nieyy/cockroach,bg451/cockroach,cockroachdb/cockroach,maxlang/cockroach,il9ue/cockroach,maxlang/cockroach,cuongdo/cockroach,paperstreet/cockroach,arjun4084346/cockroach,vivekmenezes/cockroach,maxlang/cockroach,glycerine/cockroach,vaibhavarora/cockroach,maxlang/cockroach,bg451/cockroach,cockroachdb/cockroach,nieyy/cockroach,maxlang/cockroach,vivekmenezes/cockroach,petermattis/cockroach,vivekmenezes/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,glycerine/cockroach,sunya123/cockroach,glycerine/cockroach,cuongdo/cockroach,bg451/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,arjun4084346/cockroach,cuongdo/cockroach,cockroachdb/cockroach,il9ue/cockroach,petermattis/cockroach,bg451/cockroach,veteranlu/cockroach,glycerine/cockroach,sunya123/cockroach,bg451/cockroach,petermattis/cockroach,nieyy/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,sunya123/cockroach,maxlang/cockroach,arjun4084346/cockroach,glycerine/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,veteranlu/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,sunya123/cockroach,cuongdo/cockroach,petermattis/cockroach,il9ue/cockroach,glycerine/cockroach,cuongdo/cockroach,paperstreet/cockroach,il9ue/cockroach,sunya123/cockroach,veteranlu/cockroach,bg451/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,bg451/cockroach,veteranlu/cockroach,arjun4084346/cockroach,paperstreet/cockroach,petermattis/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,glycerine/cockroach,vivekmenezes/cockroach,nieyy/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,sunya123/cockroach,nieyy/cockroach,nieyy/cockroach,il9ue/cockroach,paperstreet/cockroach,glycerine/cockroach,maxlang/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,nieyy/cockroach,paperstreet/cockroach,petermattis/cockroach,vivekmenezes/cockroach,petermattis/cockroach,sunya123/cockroach,il9ue/cockroach,sunya123/cockroach,veteranlu/cockroach,cuongdo/cockroach,maxlang/cockroach,nieyy/cockroach,petermattis/cockroach,cuongdo/cockroach,paperstreet/cockroach,il9ue/cockroach,cockroachdb/cockroach,il9ue/cockroach