Fix timeout issue with async stub TCP pipelining
Fix timeout issue with async stub TCP pipelining

shane-kerr/getdns,smogali/getdns,dkg/getdns,dkg/getdns,smogali/getdns,Acidburn0zzz/getdns,huitema/getdns,dkg/getdns,Acidburn0zzz/getdns,huitema/getdns,glenwiley/getdns,dkg/getdns,shane-kerr/getdns,huitema/getdns,shane-kerr/getdns,Acidburn0zzz/getdns,smogali/getdns,huitema/getdns,smogali/getdns,shane-kerr/getdns,glenwiley/getdns,glenwiley/getdns,Acidburn0zzz/getdns,glenwiley/getdns