change protocol version to hex encoded string in status json. Move constant from flow transport header to cpp

fdbclient/Schemas.cpp

@@ -787,7 +787,7 @@ const KeyRef JSONSchemas::statusSchema = LiteralStringRef(R"statusSchema(
             {
                "reachable":true,
                "address":"127.0.0.1:4701",
-               "protocol": 1142507688261910528
+               "protocol": "0fdb00b070010001"
             }
          ],
          "quorum_reachable":true

fdbclient/StatusClient.actor.cpp

@@ -28,6 +28,7 @@
 #include "fdbclient/json_spirit/json_spirit_reader_template.h"
 #include "fdbrpc/genericactors.actor.h"
 #include "flow/actorcompiler.h" // has to be last include
+#include <cstdint>
 
 json_spirit::mValue readJSONStrictly(const std::string &s) {
 	json_spirit::mValue val;
@@ -320,7 +321,10 @@ ACTOR Future<Optional<StatusObject>> clientCoordinatorsStatusFetcher(Reference<C
 				coordStatus["reachable"] = false;
 			}
 			if (coordProtocols[i].isReady()) {
-				coordStatus["protocol"] = coordProtocols[i].get().version.version();
+				uint64_t protocolVersionInt = coordProtocols[i].get().version.version();
+				std::stringstream hexSs;
+				hexSs << std::hex << std::setw(2*sizeof(protocolVersionInt)) << std::setfill('0') << protocolVersionInt;
+				coordStatus["protocol"] = hexSs.str();
 			}
 			coordsStatus.push_back(coordStatus);
 		}

fdbrpc/FlowTransport.actor.cpp

@@ -48,6 +48,7 @@ static NetworkAddressList g_currentDeliveryPeerAddress = NetworkAddressList();
 
 constexpr UID WLTOKEN_ENDPOINT_NOT_FOUND(-1, 0);
 constexpr UID WLTOKEN_PING_PACKET(-1, 1);
+constexpr int PACKET_LEN_WIDTH = sizeof(uint32_t);
 const uint64_t TOKEN_STREAM_FLAG = 1;
 
 class EndpointMap : NonCopyable {

fdbrpc/FlowTransport.h

@@ -254,6 +254,4 @@ inline bool Endpoint::isLocal() const {
 	return addresses.address == localAddrs.address || (localAddrs.secondaryAddress.present() && addresses.address == localAddrs.secondaryAddress.get());
 }
 
-const int PACKET_LEN_WIDTH = sizeof(uint32_t);
-
 #endif