Split fallback function and introduce "fallback()" and "receive()" syntax.

test/externalTests/solc-js/DAO/DAO.sol

@@ -174,7 +174,7 @@ abstract contract DAOInterface {
     //  );
 
     /// @notice Create Token with `msg.sender` as the beneficiary
-    function () external payable;
+    receive() external payable;
 
 
     /// @dev This function is used to send ether back
@@ -389,7 +389,7 @@ contract DAO is DAOInterface, Token, TokenCreation {
         allowedRecipients[curator] = true;
     }
 
-    function () external payable {
+    receive() external payable override(DAOInterface, TokenCreation) {
         if (now < closingTime + creationGracePeriod && msg.sender != address(extraBalance))
             createTokenProxy(msg.sender);
         else

test/externalTests/solc-js/DAO/ManagedAccount.sol

@@ -50,7 +50,7 @@ contract ManagedAccount is ManagedAccountInterface{
     // When the contract receives a transaction without data this is called.
     // It counts the amount of ether it receives and stores it in
     // accumulatedInput.
-    function() external payable {
+    receive() external payable {
         accumulatedInput += msg.value;
     }
 

test/externalTests/solc-js/DAO/TokenCreation.sol

@@ -151,6 +151,6 @@ override returns (bool success) {
             return 30;
         }
     }
-    function() external payable {
+    receive() external payable {
     }
 }