Start capturing the moment we could see data
Start capturing the moment we could see data

Previously:  capture after xfer-go-live was invoked
Now:  capture from the moment the transfer begins
Rationale:  Consider chain X->Y->Z.  If all three start capture C, and X departs
    the region provably after Y and Z started the capture, then X can rejoin
    using only C and nothing else.  This takes the transfer from sizeof(data) +
    sizeof(delta) to just sizeof(delta).

pombredanne/HyperDex,hyc/HyperDex,vashstorm/HyperDex,jtk54/HyperDex,hyc/HyperDex,vashstorm/HyperDex,tempbottle/HyperDex,jtk54/HyperDex,UIKit0/HyperDex,UIKit0/HyperDex,pombredanne/HyperDex,UIKit0/HyperDex,tempbottle/HyperDex,cactorium/HyperDex,vashstorm/HyperDex,jtk54/HyperDex,pombredanne/HyperDex,jtk54/HyperDex,rescrv/HyperDex,jtk54/HyperDex,hyc/HyperDex,jtk54/HyperDex,hyc/HyperDex,cactorium/HyperDex,rescrv/HyperDex,tempbottle/HyperDex,pombredanne/HyperDex,jtk54/HyperDex,UIKit0/HyperDex,pombredanne/HyperDex,rescrv/HyperDex,rescrv/HyperDex,UIKit0/HyperDex,cactorium/HyperDex,hyc/HyperDex,jtk54/HyperDex,jtk54/HyperDex,pombredanne/HyperDex,rescrv/HyperDex,cactorium/HyperDex,cactorium/HyperDex,vashstorm/HyperDex,rescrv/HyperDex,hyc/HyperDex,cactorium/HyperDex,UIKit0/HyperDex,rescrv/HyperDex,tempbottle/HyperDex,UIKit0/HyperDex,UIKit0/HyperDex,tempbottle/HyperDex,cactorium/HyperDex,rescrv/HyperDex,UIKit0/HyperDex,hyc/HyperDex,tempbottle/HyperDex,pombredanne/HyperDex,vashstorm/HyperDex,vashstorm/HyperDex,vashstorm/HyperDex,cactorium/HyperDex,vashstorm/HyperDex,cactorium/HyperDex,tempbottle/HyperDex,vashstorm/HyperDex,tempbottle/HyperDex,pombredanne/HyperDex,hyc/HyperDex,pombredanne/HyperDex,rescrv/HyperDex,tempbottle/HyperDex