Update to 1.30, improve COMMENT.

1.30 (2010/08/30)
  *    (ms) [RT 60665] HUP handlers are stacked on top of each other now,
            to make sure that multiple file appenders recreate multiple
            files and not just one (patch provided by Karen Etheridge).
  *    (ms) [RT 60197] Fixed uninitialized value warnings with
            the multiline appender and provided a test case (patch provided
            by Karen Etheridge)
  *    (ms) [rt.cpan.org #59617] Fixed system-wide threshold without appender
            thresholds. Bug reported by Dmitry Bigunyak.
  *    (ms) [rt.cpan.org #24884] Using require() instead of incomplete
            logic in L4p::Util::module_available(). local __DIE__
            handler takes care of user-defined __DIE__ handlers
            ignoring $^S (suggested by Eric Wilhelm and others).
  *    (ms) [rt.cpan.org #60386] Fixed init_and_watch() which
            double-bumped the caller_level and led to uninitialized
            values in the pattern layout. Thanks to Mitja Bartsch for
            the report.
  *    (ms) Applied patch by Karsten Silkenb辰umer to add an optional
            $log_dispatch_level to create_custom_level(). Updated
            documentation.

1.29 (2010/06/16)
  *    (ms) Added documentation on how to use Log4perl's :easy macros
            with Catalyst in Log::Log4perl::Catalyst.
  *    (ms) wrapper_register() now deals with caller_depth automatically.
            Backwards compatibility with old wrapper classes using
            caller_depth directly is provided. Documentation has been
            updated.
  *    (ms) Felix Antonius Wilhelm Ostmann reported Resurrector.pm
            crashes, fixed as suggested by setting the %INC value to
            the module path.
  *    (ms) Another caller_depth fix in Log::Log4perl::Catalyst.
  *    (ms) Fixed logdie() caller_depth bug reported by Rob Retter.
  *    (ms) [RT 56145] Saving errstr in DBI appender to survive ping()
  *    (ms) Added INTERNAL_DEBUG env variable to test suite triggering
            all _INTERNAL_DEBUG statements to be printed for better
            error diagnosis on misbehaving systems.

(wiz)