Update defaultAssumeValid according to release-process.md.

Updated for block 477890.

src/chainparams.cpp

@@ -101,10 +101,10 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1510704000; // November 15th, 2017.
 
         // The best chain should have at least this much work.
-        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000003f94d1ad391682fe038bf5");
+        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000723d3581fe1bd55373540a");
 
         // By default assume that the signatures in ancestors of this block are valid.
-        consensus.defaultAssumeValid = uint256S("0x00000000000000000013176bf8d7dfeab4e1db31dc93bc311b436e82ab226b90"); //453354
+        consensus.defaultAssumeValid = uint256S("0x0000000000000000003b9ce759c2a087d52abc4266f8f4ebd6d768b89defa50a"); //477890
 
         /**
          * The message start string is designed to be unlikely to occur in normal data.
@@ -205,10 +205,10 @@ public:
         consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1493596800; // May 1st 2017
 
         // The best chain should have at least this much work.
-        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000001f057509eba81aed91");
+        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000002830dab7f76dbb7d63");
 
         // By default assume that the signatures in ancestors of this block are valid.
-        consensus.defaultAssumeValid = uint256S("0x00000000000128796ee387cf110ccb9d2f36cffaf7f73079c995377c65ac0dcc"); //1079274
+        consensus.defaultAssumeValid = uint256S("0x0000000002e9e7b00e1f6dc5123a04aad68dd0f0968d8c7aa45f6640795c37b1"); //1135275
 
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;