scripted-diff: Use the C++11 keyword nullptr to denote the pointer literal instead of the macro NULL

-BEGIN VERIFY SCRIPT-
sed -i 's/\<NULL\>/nullptr/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h src/qt/*/*.cpp src/qt/*/*.h src/wallet/*/*.cpp src/wallet/*/*.h src/support/allocators/*.h
sed -i 's/Prefer nullptr, otherwise SAFECOOKIE./Prefer NULL, otherwise SAFECOOKIE./g' src/torcontrol.cpp
sed -i 's/tor: Using nullptr authentication/tor: Using NULL authentication/g' src/torcontrol.cpp
sed -i 's/METHODS=nullptr/METHODS=NULL/g' src/test/torcontrol_tests.cpp src/torcontrol.cpp
sed -i 's/nullptr certificates/NULL certificates/g' src/qt/paymentserver.cpp
sed -i 's/"nullptr"/"NULL"/g' src/torcontrol.cpp src/test/torcontrol_tests.cpp
-END VERIFY SCRIPT-

src/bitcoin-tx.cpp

@@ -822,7 +822,7 @@ static int CommandLineRawTx(int argc, char* argv[])
         nRet = EXIT_FAILURE;
     }
     catch (...) {
-        PrintExceptionContinue(NULL, "CommandLineRawTx()");
+        PrintExceptionContinue(nullptr, "CommandLineRawTx()");
         throw;
     }
 
@@ -845,7 +845,7 @@ int main(int argc, char* argv[])
         PrintExceptionContinue(&e, "AppInitRawTx()");
         return EXIT_FAILURE;
     } catch (...) {
-        PrintExceptionContinue(NULL, "AppInitRawTx()");
+        PrintExceptionContinue(nullptr, "AppInitRawTx()");
         return EXIT_FAILURE;
     }
 
@@ -856,7 +856,7 @@ int main(int argc, char* argv[])
     catch (const std::exception& e) {
         PrintExceptionContinue(&e, "CommandLineRawTx()");
     } catch (...) {
-        PrintExceptionContinue(NULL, "CommandLineRawTx()");
+        PrintExceptionContinue(nullptr, "CommandLineRawTx()");
     }
     return ret;
 }