Minor issues

[defuse]

• Link to my twitter in the navbar is broken
• A bunch of 404 links / domains that are now placeholders. I guess run a scanning tool?
• Some pages aren't listed in the list of all pages
• Some old outdated posts have no date
• Make the upvote counter min out at zero so people can't artifically make it look like a page is super hated by everyone
• There was a link to https://defuse.ca/passwordrestrictions.htm somewhere (which now 404s, probably in the navbar or list of all pages)