Database upgrade stuff

[jacob-g]

• Restructure search table
• Rebuild search index
• Add in new search cache table
• Alert the admin that user group promotion changed from > to >=

[jacob-g]

Turns out that the search cache table wasn't added, so this must be added.

[jacob-g]

Add the new language keys, and remove unnecessary page entries.

[jacob-g]

A few language keys are missing, such as "atomfeed" and "select". Verify that they are included in the upgrade.

[jacob-g]

Verify that all new stuff is included, and make sure the stock cache is up to date.

[jacob-g]

A few keys are still missing from both the upgrade and stock cache and not all things are updated.

[jacob-g]

There are a few new language keys (such as "ban", "banuser", and "unbanuser"), and a database change in the bans table for ip from varchar to text. Both update the stock cache and upgrade utility.

[jacob-g]

Also test that the UNIQUE database key for usernames in the bans table is successfully dropped.

[jacob-g]

Now the stock cache needs to be updated to reflect the new language keys.

[jacob-g]

Also need to add the language keys and structure for the new moderator privileges.