[1.2.X] Fixed #14398 -- Changed runfcgi command to interpret the umask option...

[1.2.X] Fixed #14398 -- Changed runfcgi command to interpret the umask option argument as an octal value.
Thanks petteyg for report and aptiko for help with the fix.

Backport of [14360] from trunk

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14362 bcc190cf-cafb-0310-a4f2-bffc1f526a37