lnd: removing activeNetParams global, passed around instead via configs

This commit removes the activeNetParams global in chainparams.go. This
is necessary to isolate code from the lnd package so we can import it
for use in tests, other projects, etc.

pilot.go

@@ -76,6 +76,7 @@ type chanController struct {
 	minConfs      int32
 	confTarget    uint32
 	chanMinHtlcIn lnwire.MilliSatoshi
+	netParams     bitcoinNetParams
 }
 
 // OpenChannel opens a channel to a target peer, with a capacity of the
@@ -97,7 +98,7 @@ func (c *chanController) OpenChannel(target *btcec.PublicKey,
 	// the funding workflow.
 	req := &openChanReq{
 		targetPubkey:     target,
-		chainHash:        *activeNetParams.GenesisHash,
+		chainHash:        *c.netParams.GenesisHash,
 		subtractFees:     true,
 		localFundingAmt:  amt,
 		pushAmt:          0,
@@ -141,7 +142,8 @@ var _ autopilot.ChannelController = (*chanController)(nil)
 // interfaces needed to drive it won't be launched before the Manager's
 // StartAgent method is called.
 func initAutoPilot(svr *server, cfg *lncfg.AutoPilot,
-	chainCfg *lncfg.Chain) (*autopilot.ManagerCfg, error) {
+	chainCfg *lncfg.Chain, netParams bitcoinNetParams) (*autopilot.ManagerCfg,
+	error) {
 
 	atplLog.Infof("Instantiating autopilot with active=%v, "+
 		"max_channels=%d, allocation=%f, min_chan_size=%d, "+
@@ -181,6 +183,7 @@ func initAutoPilot(svr *server, cfg *lncfg.AutoPilot,
 			minConfs:      cfg.MinConfs,
 			confTarget:    cfg.ConfTarget,
 			chanMinHtlcIn: chainCfg.MinHTLCIn,
+			netParams:     netParams,
 		},
 		WalletBalance: func() (btcutil.Amount, error) {
 			return svr.cc.wallet.ConfirmedBalance(cfg.MinConfs)
@@ -206,7 +209,7 @@ func initAutoPilot(svr *server, cfg *lncfg.AutoPilot,
 
 			lnAddr := &lnwire.NetAddress{
 				IdentityKey: target,
-				ChainNet:    activeNetParams.Net,
+				ChainNet:    netParams.Net,
 			}
 
 			// We'll attempt to successively connect to each of the