Don't let --report affect XML output; always print all information.

Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2007-09/msg00020.html>.
* src/conflicts.c (log_resolution): Implement.
* src/print-xml.c (print_core): Implement.
(print_state): Implement.
(print_xml): Implement.

* NEWS (2.3a+): Fix quotes.
* src/parse-gram.y (prologue_declaration): For consistency with -v,
don't let %verbose clear the list specified by --report.

src/parse-gram.y

@@ -305,7 +305,7 @@ prologue_declaration:
       skeleton_arg (skeleton_user, 1, &@1);
     }
 | "%token-table"                { token_table_flag = true; }
-| "%verbose"                    { report_flag = report_states; }
+| "%verbose"                    { report_flag |= report_states; }
 | "%yacc"                       { yacc_flag = true; }
 | /*FIXME: Err?  What is this horror doing here? */ ";"
 ;