tigefa4u projects Trac

Fixed unicode problems when using the PyPgSQL postgresql driver. Closes #3013.

Converted HTTP authentication in [wiki:TracStandalone tracd] to WSGI middleware. Also made authentication completely optional: if the option is not provided, a request handler such as one for form-based authentication can still perform the authentication. Closes #3036.

Follow-up to r3141, forgot to import `to_unicode` + better error message for timeline event provider failure

Follow-up to r3135: also show property line breaks in TracChangeset. Factor out the rendering code in versioncontrol/web_ui/util.py, also in preparation for future improvements (see #1601).

WorkFlow:

* Added `ITicketAdjunctChangeListener` interface for obsverving changes to milestones, versions, etc.
* Trunk merged log:trunk@...:3154.

Reorganized standard wiki tests (i.e. those remaining in trac/wiki/tests/wiki-tests.txt)

The tests are now listed using the same order as their corresponding rules:
1. bold, italic, etc. related tests
2. link resolvers
3. wikiprocessors and macros
4. headings, lists, table

This makes it easy to spot the missing tests and where to add new ones.

`IWikiSyntaxProvider` related unit-tests are now dispatched in their relevant modules.

* Better display of wiki unit-tests failure, so that it's easy
to grasp the difference between ''expected'' result and
''actual'' result.
* In `trac.wiki.tests.formatter`, the link resolver syntax is tested
using a sample link resolver
* finally, there's a test file trac/tests/allwiki.py file which
can be used to test all the wiki related tests in Trac core.

Now it becomes fairly easy for plugins to add their own tests
for the wiki syntax they provide.

Use the wiki formatter test title as the ''shortDescription'' of the test.

Spam filtering as a plugin... mostly untested and highly experimental.

Restarting spam-filter branch as plugin.