fix some bug for transfer
reimpl cookies and rename cache time
add cookies to http
impl http date interfaces
impl cookies instance
rebuild aico exit interfaces
impl aico exit callback and modify demo
impl dns exit callback
modify callback priv name and type
modify the async stream interfaces
impl transfer clos callback
debuging transfer clos
fix acio some exit bug
debuging for transfer exit
fix some transfer bug
impl sock clos callback
impl all async stream close
using istate for basic stream
using unique state fro ssl and stream
add basic and async transfer