minor license, header end comment etc. cleanup in /script

- ensure all licenses are just MIT
- add a missing header end comment
- ensure alphabetical ordering

src/script/interpreter.h

@@ -10,10 +10,10 @@
 #include <stdint.h>
 #include <string>
 
-class uint256;
 class CPubKey;
 class CScript;
 class CTransaction;
+class uint256;
 
 /** Signature hash types/flags */
 enum