Store metadata in ban/censor/ticket/improper entry

[retropc]

G does not store who set what ban/censor/ticket/improper etc., I think it should do that, not only for accountability, but also for finding who to contact regarding a specific ban/censor/ticket etc.

And also for oneself, I know most of the bans/censors I set have reason "get out", "stay out" or "no thanks", but storing the owner's account makes things easier. Also other info should/could be stored, such as timestamp when added, last used, etc.

(originally reported by wiebe)