The test_list of the grammar was wrong after reading more carefuly

the RFC.

+2001-02-22  Alain Magloire
+
+	* sieve : New Directory.
+	* sieve/lex-sieve.lex : RFC3028 tokenizer.
+	* sieve/gram-sieve.y : RFC3028 grammar.
+
 2001-02-20  Alain Magloire
 
 	* mailbox/mailbox.c (mailbox_set_ticket mailbox_set_authority

@@ -45,7 +45,9 @@ reject : SIEVE_REJECT SIEVE_STRING ;
 
 require : SIEVE_REQUIRE string_list ;
 
-test_list : '(' test ')' | '(' test ',' test ')' | test;
+test_list : '(' tests ')' ;
+
+tests : test | test ',' tests ;
 
 test : test_address | test_anyof | test_envelope | test_false | test_exists
      | test_header | test_not | test_size | test_true ;