DE locale update.
Actually block issues from closing when a blocking issue isn't closed (#1740).
Fixed: login form fields have different width with IE (#3582).
Do not use settings/settings partial name in sample plugin (#3557).
Fixes links to wiki atom feed (#3581).
Fixed: case sensitivity in issue subject filtering (#3536).
Merged r2794 from trunk.
Fixes wiki diff escaping.
Fixes broken --unknown-user option in mailhandler script (#3514).
Fixes default data loader broken by r2777 (#3507).
