Set Overwinter protocol version to 170005

170004 is the protocol version for the NODE_BLOOM change, which is being
"released" in this RC. The activation height is being set in the final release,
which means that we may end up with both RC and final release versions online
when Overwinter activates. Bumping the protocol version for Overwinter enables
RC nodes to be correctly disconnected.

src/chainparams.cpp

@@ -101,7 +101,7 @@ public:
         consensus.vUpgrades[Consensus::UPGRADE_TESTDUMMY].nProtocolVersion = 170002;
         consensus.vUpgrades[Consensus::UPGRADE_TESTDUMMY].nActivationHeight =
             Consensus::NetworkUpgrade::NO_ACTIVATION_HEIGHT;
-        consensus.vUpgrades[Consensus::UPGRADE_OVERWINTER].nProtocolVersion = 170004;
+        consensus.vUpgrades[Consensus::UPGRADE_OVERWINTER].nProtocolVersion = 170005;
         consensus.vUpgrades[Consensus::UPGRADE_OVERWINTER].nActivationHeight =
             Consensus::NetworkUpgrade::NO_ACTIVATION_HEIGHT;