tigefa4u projects Trac

Moved the flexible WikiPageNames scheme from InterTrac to FlexibleWikiPageNames, and updated it to the newest way of enabling/disabling plugins

FlexibleWikiPageNames branch: this branch will focus on implementing the flexible WikiPageNames scheme that can currently be found in InterTrac

InterTrac: merged changes from trunk (log:trunk@...:2361)

InterTrac: removed the TracDiff feature from that branch.

This branch will now only contain the InterTrac, InterWiki
and extended InterWiki links (see #1414) as a diff on the trunk
(currently on r2319).

Clean-up of branches/cboos-dev

make `Component.__getattr__` show the class name as well as the attribute name when the attribute does not exist

Applied a slightly modified patch from Emmanuel Blot that makes trac-admin use the PermissionStore API. Closes #2223.

Prevent the connection to be garbage-collected before getting used. The problem was introduced by r2355 and affected pysqlite-1.1.x, but not pysqlite-2.x. Closes #2230.

Apply patch for bugzilla2trac contrib script provided by asmodai. Closes both #2061 and #2229.

When Trac uses SQLite3/PySQLite2 for its DatabaseBackend, concurrent writes
were not handled well: this could lead to persistent database locks
and, occasionally, to crashes (see #2170).

With the present changes, the issue is fixed, ''provided'' the SQLite library
which is used was compiled in thread-safe mode.
This is always the case on Windows, but Linux users (and probably all Unix users)
will certainly have to recompile their SQLite package (3.2.7 preferred)
using the `--enable-threadsafe` configuration option.

Note that ''without'' a threadsafe SQLite, Trac ''will'' continue to work,
simply it will still be vulnerable to the abovementioned problem.

Finally, note that ''without'' this patch, Trac simply won't work with
a threadsafe SQLite binary on Linux (see #2196).