Expose DefaultPerPeerRateLimit as var (#1580)

Expose DefaultPerPeerRateLimit as var

Author: millken

p2p/net/swarm/swarm_dial.go

@@ -65,7 +65,7 @@ const ConcurrentFdDials = 160
 
 // DefaultPerPeerRateLimit is the number of concurrent outbound dials to make
 // per peer
-const DefaultPerPeerRateLimit = 8
+var DefaultPerPeerRateLimit = 8
 
 // dialbackoff is a struct used to avoid over-dialing the same, dead peers.
 // Whenever we totally time out on a peer (all three attempts), we add them