Add coroutine support to dns queries
Add coroutine support to dns queries

zhaozg/luvit,kaustavha/luvit,kaustavha/luvit,bsn069/luvit,zhaozg/luvit,luvit/luvit,bsn069/luvit,bsn069/luvit,luvit/luvit,kaustavha/luvit