Consolidate individual references to the current maximum peer connection

value of 125 into a single constant declaration.

src/net.h

@@ -61,6 +61,8 @@ static const bool DEFAULT_UPNP = false;
 static const size_t MAPASKFOR_MAX_SZ = MAX_INV_SZ;
 /** The maximum number of entries in setAskFor (larger due to getdata latency)*/
 static const size_t SETASKFOR_MAX_SZ = 2 * MAX_INV_SZ;
+/** The maximum number of peer connections to maintain. */
+static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 125;
 
 unsigned int ReceiveFloodSize();
 unsigned int SendBufferSize();