Don't expose `Config` to `Connection'` monad
Don't expose `Config` to `Connection'` monad

Config contains IO related code and code not relevant to our
Connection. In fact, only the network is used in Connection'. To
simplify things, we can just expose network to Connection'.

clample/lamdabtc,clample/lambdabtc,clample/lamdabtc,clample/lambdabtc