Do not increment nAttempts by more than one for every Good connection.

This slows the increase of the nAttempts in addrman while partitioned,
 even if the node hasn't yet noticed the partitioning.

src/net.cpp

@@ -1633,7 +1633,7 @@ void ThreadOpenConnections()
         }
 
         if (addrConnect.IsValid())
-            OpenNetworkConnection(addrConnect, (int)setConnected.size() >= min(nMaxConnections - 1, 2), &grant);
+            OpenNetworkConnection(addrConnect, (int)setConnected.size() >= std::min(nMaxConnections - 1, 2), &grant);
     }
 }