Change how sudo.conf is parsed. We now do a quick parse and then

set the values after the entire file has been parsed.  This lets
us init the debug system earlier.  Plugin-specific debug flags are
now stored in struct plugin_info and struct plugin_container and
passed to the plugin via one or more debug_flags settings.

plugins/sudoers/sudoers.h

@@ -41,6 +41,7 @@
 #include "logging.h"
 #include "sudo_nss.h"
 #include "sudo_plugin.h"
+#include "sudo_conf.h"
 #include "sudo_debug.h"
 #include "sudo_util.h"