Add a NODE_GETUTXO service bit and document NODE_NETWORK.

Stop translating the NODE_* names as they are technical and cannot be translated.

src/protocol.h

@@ -67,7 +67,14 @@ public:
 
 /** nServices flags */
 enum {
+    // NODE_NETWORK means that the node is capable of serving the block chain. It is currently
+    // set by all Bitcoin Core nodes, and is unset by SPV clients or other peers that just want
+    // network services but don't provide them.
     NODE_NETWORK = (1 << 0),
+    // NODE_GETUTXO means the node is capable of responding to the getutxo protocol request.
+    // Bitcoin Core does not support this but a patch set called Bitcoin XT does.
+    // See BIP 64 for details on how this is implemented.
+    NODE_GETUTXO = (1 << 1),
 
     // Bits 24-31 are reserved for temporary experiments. Just pick a bit that
     // isn't getting used, or one not being used much, and notify the

src/qt/guiutil.cpp

@@ -878,10 +878,13 @@ QString formatServicesStr(quint64 mask)
             switch (check)
             {
             case NODE_NETWORK:
-                strList.append(QObject::tr("NETWORK"));
+                strList.append("NETWORK");
+                break;
+            case NODE_GETUTXO:
+                strList.append("GETUTXO");
                 break;
             default:
-                strList.append(QString("%1[%2]").arg(QObject::tr("UNKNOWN")).arg(check));
+                strList.append(QString("%1[%2]").arg("UNKNOWN").arg(check));
             }
         }
     }