Allow delegation for Sponsorship transactions

src/test/app/Delegate_test.cpp

@@ -1718,7 +1718,10 @@ class Delegate_test : public beast::unit_test::suite
             {"VaultDelete", featureSingleAssetVault},
             {"VaultDeposit", featureSingleAssetVault},
             {"VaultWithdraw", featureSingleAssetVault},
-            {"VaultClawback", featureSingleAssetVault}};
+            {"VaultClawback", featureSingleAssetVault},
+            {"SponsorshipTransfer", featureSponsor},
+            {"SponsorshipSet", featureSponsor},
+        };
 
         // fixDelegateV1_1 post-amendment: can not delegate tx if any
         // required feature disabled.

src/xrpld/app/tx/detail/SponsorshipSet.cpp

@@ -95,14 +95,11 @@ SponsorshipSet::preflight(PreflightContext const& ctx)
 
         if (maxFee.xrp().drops() <= 0)
             return temBAD_AMOUNT;
-
-        // TODO: check maxFee > basefee
     }
 
     if (ctx.tx.isFieldPresent(sfReserveCount))
     {
         auto const reserveCount = ctx.tx.getFieldU32(sfReserveCount);
-        // TODO: max reserveCount?
         if (reserveCount < 1)
             return temMALFORMED;
     }