Make directory forbidden

Prevents unwanted access to at least some of the information.
(but they should still be able to open specific PHP files. I should fix that.)
Save comments as files, and log output
Automatically die if the user accesses `commpentsubmit.php` directly,
rather than by the form on the blog.
Complete `spam_check_url` function in `spamfilter.php`
Update spam keywords
Merge branch 'dev'