Rename CreateThread to NewThread

Prevent clash with win32 API symbol

src/rpcwallet.cpp

@@ -1302,9 +1302,9 @@ Value walletpassphrase(const Array& params, bool fHelp)
             "walletpassphrase <passphrase> <timeout>\n"
             "Stores the wallet decryption key in memory for <timeout> seconds.");
 
-    CreateThread(ThreadTopUpKeyPool, NULL);
+    NewThread(ThreadTopUpKeyPool, NULL);
     int64* pnSleepTime = new int64(params[1].get_int64());
-    CreateThread(ThreadCleanWalletPassphrase, pnSleepTime);
+    NewThread(ThreadCleanWalletPassphrase, pnSleepTime);
 
     return Value::null;
 }