Bunch of cleanups with a few notable enhancements since 1.3.0-rc1:
- revision traversal infrastructure is updated so that existence of paths limiters and/or --max-age does not cause it to call limit_list(). This helps the latency working with the command quite a bit.
- comes with updated gitk.
One notable fix is to make sure that the IO is restarted upon signal even on platforms whose default signal semantics is not to do so. This is the fix for the notorious "clone is broken since 1.2.2 on Solaris" problem.