Windows: AFS_Startup_Event must query Debug value

Windows: AFS_Startup_Event must query Debug value

For proper debugging to be performed within the AFS_Startup_Event
processing, the "Debug" value must be queried from the registry.

Reviewed-on: http://gerrit.openafs.org/7633
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 7fd1dc6c887c3bf786632901bc72b8250298a98f)

Change-Id: I0a58b45890a505ba9ddab24582deaf0c70571a66
Reviewed-on: http://gerrit.openafs.org/8633
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>