Chirpy! Code

Stripping out whacked ASCII characters.

Adding ability to specify captcha code length (forgot rndmax somehow).

Removing tags from entry bodies since they are now passed as categories.

Bugfix: don't remove the wrong captcha image.

Making session expiry cache column not null and setting default expiry time of 3 days upon upgrading; setting expiry time to 3 days if none is configured or parsing failed.

Making check for expired sessions a lot faster.

More aggressive captcha database updates, avoiding images getting left behind

Some refactoring.

Adding strikethrough on used rating links.

Fixing docs.