nit: Handle ChipNet "maxBackLog" in Controller::downloadTaskRecommend…

…edThrottleTimeMsec

ChipNet wasn't being explicitly handled in this function, even though it would end up
effectively producing the same results as before this commit (at least
before block 1.3 million).

src/Controller.cpp

@@ -857,8 +857,8 @@ unsigned Controller::downloadTaskRecommendedThrottleTimeMsec(unsigned bnum) cons
         } else if (sm->net == BTC::ScaleNet) {
             if (bnum > 10'000)
                 maxBackLog = 10; // on ScaleNet, after block 10,000 -- we may start to hit big blocks.
-        } else if (sm->net == BTC::TestNet4) {
-            // nothing, use 1000 always, testnet4 has has 2MB blocks.
+        } else if (sm->net == BTC::TestNet4 || sm->net == BTC::ChipNet) {
+            // nothing, use 1000 always, testnet4 & chipnet have 2MB blocks.
         } else {
             // testnet
             if (bnum > 1'300'000) // beyond this height 32MB blocks may be common, esp. in the future