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

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.