ConnectionBase: refuse to create connections for destroyed channels
ConnectionBase: refuse to create connections for destroyed channels

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