[Mimedefang] 12,000 /var/spool/MIMEDefang/mdefang-xxxxxxxxxxxxxx directories in 7 days

[Xiaoyan Ma]

>When I took a look in the /var/spool/MIMEDefang directory, I was quite 
>surprised to see over 12,000 directories with timestamps spanning the 
>previous 7 days.
>
>It would appear that they weren't deleted because the directory (still) 
>contained contents.

This happened to me when we first implemented MD.  I was running with -d 
flag, enable debugging.

Xiaoyan