clfilter: use empty frozenset intead of empty tuple This will allows set operation needed for cache collaboration.

run-tests.py: don't use console for stdin when running in debug mode Tests would wait for input instead of using non-interactive mode.

tests: make hghave and run-tests exit on unknown feature requirements

test-largefiles.t: fix wrong '#if hgweb' - it should be '#if serve' A bug introduced in 0c1d10351869 did that a part of the test never was run.

dispatch: show empty filename in OSError aborts Mercurial would sometimes exit with: abort: No such file or directory where str of the actual OSError exception was the more helpful: [Errno 2] No such file or directory: '' The exception will now always show the filename and quote it: abort: No such file or directory: ''

test-dispatch.t: remove incorrect "cd $dir" A line that should have been removed in 50fbe9063ff2.

merge with crew-stable

dispatch: handle empty `testedwith` value in extension When extensions had an empty `testedwith` attribute the code tried to parse it and failed. As a result the actual error were shallowed by a This crash. We now treat empty strip as 'unknown'

destroyed: filter unknown before computing branchcache Branchcache of filtered version need up to date phase data.

branchmap: disable fallback to unfiltered branchcache Disables this simple optimisation to allow coming more powerfull approach: cache collaboration. Our goal is to have branchcache collaborate. This means that unfiltered branchcache will fallback to some filtered branchcache if invalid. We can't have the filtered branchcache to use the unfiltered one. That would loop.