even if only defined to NULL. This means the accessors can always be
present.
Use RTLD_PRELOAD_VAR instead of _PATH_SUDO_NOEXEC to tell when
noexec is available.
Add ENABLE_SUDO_PLUGIN_API and use it instead of _PATH_SUDO_PLUGIN_DIR
to tell when the plugin API is available.
Add sudo_conf_clear_paths() to clear the path values so the
regress tests are not affected by compile-time settings.
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.
