Rename block_dao -> reject_dao.

ethcore/src/evm/schedule.rs

@@ -81,7 +81,7 @@ pub struct Schedule {
 	/// Gas price for copying memory
 	pub copy_gas: usize,
 	/// DAO Rescue softfork block
-	pub block_dao_transactions: bool,
+	pub reject_dao_transactions: bool,
 }
 
 impl Schedule {
@@ -128,7 +128,7 @@ impl Schedule {
 			tx_data_zero_gas: 4,
 			tx_data_non_zero_gas: 68,
 			copy_gas: 3,	
-			block_dao_transactions: false,
+			reject_dao_transactions: false,
 		}
 	}
 }