Log Message:
updated to 1.18
Changelog:
1.18 (2008/08/23)
    *   (ms) Added explanation that categories and loggers are the same
             thing (thanks to Rabbit).
    *   (ms) Fixed t/053Resurrect to work with 5.005_03
    *   (ms) Added preinit_callback function for init_and_watch()
    *   (ms) Applied patch by Andy Grundman which speeds up is_LEVEL()
             calls by skipping unnecessary string concatenations
             (http://rt.cpan.org/Ticket/Display.html?id=38537).
    *   (ms) Applied patch by Jae Gangemi addding a no_warning option to the
             socket appender
             (http://rt.cpan.org/Ticket/Display.html?id=34399).