tigefa4u projects Trac

TracMercurial for 0.11: fix `MercurialRepository.get_changes`, which means that arbitrary diffs should now work (expect for the tracking of copy/renames)

TracMercurial for 0.11: refactor creation of sub-nodes

TracMercurial for 0.11: fix `short_rev` for the rev 0

TracMercurial for 0.11: explicitly require Trac 0.11

Let the Search module decide which are the active filters. Fixes #6131 using the solution proposed by osimons.

The `SubversionConnector` now lazily imports the SVN bindings, so that:
* the bindings are not loaded when the versioncontrol components are disabled, as they are known to cause problems with multiple subinterpreters (for example with mod_python or mod_wsgi).
* the exact exception with import failures can be logged, which can be important to figure out installation problems.
Closes #6102. Many thanks to Manuzhai for the patch.

Fix up #6104

Add Sergey and Tim for their Russian and Korean translation help.

Update the Korean translation with text provided by Kim Taedong.
See: #5477

Testing: code cleanups; including a sleep that makes the #3833 test PASS. All tests now PASS.