tigefa4u projects Trac

sandbox/notification:
* Notification.py:
* Fix up plain text (Ascii, no encoding) notification emails
* Fix up folded line syntax (SMTP message headers)
* Unit tests:
* Fix up SMTP server usage (server termination)
* Unit test for date format
* Unit test for Bcc recipient privacy
* Unit test for the 3 MIME supported encodings (message body)

sandbox/notification: email notification unit test improvement
* SMTP server is spawned once for all unit test (address reuse issue prevention)
* Add a basic SMTP parser to extract headers and body from a SMTP message
* Add a new test to validate basic SMTP message structure

Refactor the way ticket timeline events are generated.

The `UpdateDetailsForTimeline` component is gone (sigh, my first plugin...)
and the change and update events are now generated by roughly the same code.

This closes #1895.

TracChangeset has now a better caching behavior.

A given changeset will be reloaded if the underlying repository has been modified,
if the changeset is not the last changeset anymore (and it will then correctly show the ''Next Changeset'' link), etc.

Also added the ''age'' information, as requested in #2451.

Better support for hierarchical wiki page names, by removing trailing slashes. Suggested by Shunichi Goto (closes #2149).

Added `ticket remove <num>` command for TracAdmin

sandbox/notification: fix up issue with presentation of the CC field: rebuild email address separators on ticket submission

Improve handling of boolean configuration options: instead of retrieving a string and comparing to the value list in `trac.util.TRUE` or `trac.util.FALSE`, use the `config.getbool()` method.

Fix missing import in contrib script added in [2630].

Added script for getting rid of the severity field in upgraded Trac environments.