tigefa4u projects Trac

PermissionPolicy: Fixed typo in wiki module and applied policy to search filters earlier.

DiscussionPolicy:

* Migrated attachment module. Attachment resource ID's are in the form `('attachment', (<parent-type>, <parent-id>, <filename>))`.
* Also updated ticket and Wiki interfaces to check permissions when viewing attachments.
* Migrated search module. Added a variety of control points, including `search_filter`, `search_terms` and `search_result`.
* Migrated about module. Resource ID's are in the form `('about', <page>)`.

don't open the file inside the try/finally since you can't run `close` it `open` failed (see r3213 and fix in r3224 for #3063)

Fixed another situation where `mime_type` could have been `None` in attachment preview.

Fix code hastily written in env.py... Should close #3063.

WorkFlow: Fix for bugs introduced by fully converting ticket fields from dicts to objects.

In HTML preview rendering, forgot to cope with the case a MIME type was not detected. Related to the issue found with an attachment on #1602.

Oops, removed too much text.

0.9-stable: Oops, removed too much text.

Correction: Mr. Kazuhiro Nishiyama is not an InterAct employee.