spam-filter: add filter hooks to ticket module
spam-filter: add filter based on http://akismet.com/
Port [2736] to 0.9-stable.
Properly escape text in inline code.
port [2734] to 0.9-stable
ticket wiki syntax shouldn't match extra characters before the # (fixes #2557)
spam-filter: merge with [source:trunk@...]
snapshotting spam filter
Port [2730] to 0.9-stable.
Fix double escaping in patch mimeviewer. Closes #2558.