remove connection on close
remove connection on close

bunnyblue/tchannel,benfleis/tchannel,chenwenbin928/tchannel,hustxiaoc/tchannel,sasa233/tchannel,i/tchannel,hustxiaoc/tchannel,RyanTech/tchannel,savaki/tchannel,sasa233/tchannel,vanloswang/tchannel,vanloswang/tchannel,bunnyblue/tchannel,Zirpon/tchannel,sasa233/tchannel,vanloswang/tchannel,savaki/tchannel,chenwenbin928/tchannel,i/tchannel,bunnyblue/tchannel,i/tchannel,RyanTech/tchannel,chenwenbin928/tchannel,hustxiaoc/tchannel,benfleis/tchannel,benfleis/tchannel,Zirpon/tchannel,Zirpon/tchannel,RyanTech/tchannel,savaki/tchannel