Adds name/appearance bans. They're based on jobban code, but prevent the banned player from using their preset names and appearances.

Also corrects a spelling error (Indentity) in the char prefs panel.
Forgot the key .dm. Adding banappearance.dm
Fixed manual appearance bans accepting a duration. Tidied up and improved a SQL query.
Merge pull request #169 from Petethegoat/appearanceban

Adds name/appearance bans. They're based on jobban code, but prevent the...