Require compressed keys in segwit as policy and disable signing with uncompressed keys for segwit scripts

src/script/script_error.h

@@ -62,6 +62,7 @@ typedef enum ScriptError_t
     SCRIPT_ERR_WITNESS_MALLEATED,
     SCRIPT_ERR_WITNESS_MALLEATED_P2SH,
     SCRIPT_ERR_WITNESS_UNEXPECTED,
+    SCRIPT_ERR_WITNESS_PUBKEYTYPE,
 
     SCRIPT_ERR_ERROR_COUNT
 } ScriptError;