TChannelPeer: support changing the score strategy
TChannelPeer: support changing the score strategy

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