Testing: add FAILING regression test for #5022
Testing: merge through r6013 from trunk.
Testing: merged through r6011 from trunk
Testing: Add placeholder for #5572 feature regression test.
Testing: merge through r6010 from trunk (no test case; this is multi-project related)
Testing: merge through r6009 from trunk
Add unittests to cover #6011
Testing: remove obsolete comment
Testing: merge through r6006 from trunk. One of the #3833 tests still fails, but the reason is not yet clear.
Testing: Add FAILING testcases for #3833