Add support for XLS-81 Permissioned DEX (#5404)

Modified transactions:
- OfferCreate
- Payment

Modified RPCs:
- book_changes
- subscribe
- book_offers
- ripple_path_find
- path_find

Spec: https://github.com/XRPLF/XRPL-Standards/pull/281

src/test/ledger/Directory_test.cpp

@@ -132,7 +132,8 @@ struct Directory_test : public beast::unit_test::suite
 
         // Now check the orderbook: it should be in the order we placed
         // the offers.
-        auto book = BookDirs(*env.current(), Book({xrpIssue(), USD.issue()}));
+        auto book = BookDirs(
+            *env.current(), Book({xrpIssue(), USD.issue(), std::nullopt}));
         int count = 1;
 
         for (auto const& offer : book)
@@ -291,7 +292,8 @@ struct Directory_test : public beast::unit_test::suite
         // should have no entries and be empty:
         {
             Sandbox sb(env.closed().get(), tapNONE);
-            uint256 const bookBase = getBookBase({xrpIssue(), USD.issue()});
+            uint256 const bookBase =
+                getBookBase({xrpIssue(), USD.issue(), std::nullopt});
 
             BEAST_EXPECT(dirIsEmpty(sb, keylet::page(bookBase)));
             BEAST_EXPECT(!sb.succ(bookBase, getQualityNext(bookBase)));