Reorder dnsseed list, Jeff's seed list is static so put it last.

Because new nodes pull from the first connected node the load
balancing of the first connection is more important than it should
be. This change puts Pieter's seed first, because its probably
the best maintained right now.

src/net.cpp

@@ -1137,10 +1137,10 @@ void MapPort()
 // The first name is used as information source for addrman.
 // The second name should resolve to a list of seed addresses.
 static const char *strDNSSeed[][2] = {
-    {"xf2.org", "bitseed.xf2.org"},
-    {"bluematt.me", "dnsseed.bluematt.me"},
     {"bitcoin.sipa.be", "seed.bitcoin.sipa.be"},
+    {"bluematt.me", "dnsseed.bluematt.me"},
     {"dashjr.org", "dnsseed.bitcoin.dashjr.org"},
+    {"xf2.org", "bitseed.xf2.org"},
 };
 
 void ThreadDNSAddressSeed(void* parg)