Why isn't stats_temp_directory automatically created?

Hi,

log_directory is automatically created if not present when starting
the database server. But, stats_temp_directory is not created. Why?
ISTM that current behavior is undesirable.

Is it worth making the patch which creates stats_temp_directory
if not present?

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center