test: explicitly disable sparse-revlog in test-http-bad-server.t The `test-http-bad-server.t` test is very fragile with hard-coded number all around. Adding any new capability have massive consequences on it that are long and tiresome to handle. Since the test check more generic protocol level behavior, it does not need to follow all new capabilities. Disabling the capabilities is a much simpler way to avoid the issue. We make sure `sparse-revlog` will not impact this test once turned on by default. Differential Revision: https://phab.mercurial-scm.org/D5313

test: explicitly disable sparse-revlog in test-generaldelta.t That test is about testing generaldelta without further improvement. We ensure it will stay that way even if sparse-revlog is turned on by default. The sparse-revlog format is tested on his own in a different test file. Differential Revision: https://phab.mercurial-scm.org/D5312

sparse-revlog: disable sparse-revlog if config disable general-delta Sparse-revlog requires general-delta in order to work. If general-delta is explicitly disabled through configuration, we should honor that and also disabled sparse-revlog. This change will be more relevant when sparse-revlog is enabled by default. Differential Revision: https://phab.mercurial-scm.org/D5311

test: fix config typo in test-upgrade-repo.t Differential Revision: https://phab.mercurial-scm.org/D5310

tests: use $RUNTESTDIR instead of $TESTDIR in narrow-library.sh This is done so that third party extensions can use narrow-library.sh in tests. Differential Revision: https://phab.mercurial-scm.org/D5400

tests: update network related errors for Debian 9 We have a CI job that runs the Mercurial tests in parallel. Some of the network related failures seems to be different on the environment. Oddly, those failures happens only when running the tests in parallel, not when running the test file only. I have no idea how to get the windows formatted message for the error, if someone could give me an hand, I will update this changeset with the value. Differential Revision: https://phab.mercurial-scm.org/D5401

util: implement pop() on lrucachedict This moves __delitem__() to pop() as the requirement is pretty much the same, and reimplement __delitem__() by using pop().

util: add method to peek item in lrucachedict I want a function that doesn't unnecessarily update the internal state of the cache dict after fork().

commandserver: loop over selector events An IPC socket will be waited by the same selector.

commandserver: remove redundant "if True" block