util: ignore invalid path errors in path_auditor.

merge with crew-stable

merge: fix a copy detection bug (issue672) When merging rev1 and rev2, we want to search for copies that happened in rev1 but not in rev2 and vice-versa. We were starting the search at rev1/rev2 and then going back, stopping as soon as we reached the revno of the ancestor, but that can miss some cases (see the new test-issue672). Now we calculate the revisions that are ancestors of rev1 or rev2 (but not both) and make sure the search doesn't stop too early. Simplified test provided by mpm, based on a test case provided by Edward Lee.

merge with crew-stable

Added test for commands.dispatch (especially 88803a69b24)

test-context.py: Don't create second repo instance (fixed since 7b5723c95a82)

fancyopts: Copy list arguments in command table before modifying. Before this, executing commands.dispatch(['log', '-r', '0']) commands.dispatch(['log', '-r', 'tip']) would look like: hg log -r 0 hg log -r 0 -r tip Reported by TK Soh, patch by Alexis S. L. Carvalho

Print less scary message if the system supports symlinks: "Skipping test-no-symlinks: system supports symbolic links" instead of "Skipping test-no-symlinks: unexpected feature: symbolic links"

Hide absolute path from test-no-symlinks output. And add missing eol and remove trailing space which where introduced by the patches adding this test.

Make a few portability improvements to path auditing code.