hghave: add a check for lfs-test-server This is consistent with how the other tests require a feature.

hgweb: show changeset age in more places (gitweb and monoblue) mercurial.js has a process_dates() function that calculates relative age for a given date, it works for all elements with "age" css class. If those elements also have "date" css class, the original text is preserved and age is added at the end. This patch adds these two css classes in some pages in gitweb and monoblue that weren't already using this feature.

obsolete: drop usage of changectx in '_computecontentdivergentset' Changectx are expensive and not needed there. The use of `repo.set` denote old code that predate the introduction of `repo.revs` that we now use. On my mercurial repository 495 draft: before: 0.054239 second after: 0.046935 second On a mercurial repository with 115973 draft: before: 0.564548 second after: 0.130534 second

obsolete: drop usage of changectx in '_computephasedivergentset' Changectx are expensive and not needed there. The use of `repo.set` denote old code that predate the introduction of `repo.revs` that we now use. On my mercurial repository 495 draft: before: 0.010275 second after: 0.008832 second On a mercurial repository with 115973 draft: before: 0.899255 second after: 0.397131 second

hgweb: remove unused Graph() properties Both of these were introduced in 0dba955c2636, but were already unused.

gitweb: remove unused css classes Looks like they were unused since the very introduction of gitweb theme in 385b8872b8e3.

monoblue: also highlight target line on annotate and comparison pages Clicking on a line link on pages that show any kind of file contents (including diffs) should highlight that line, and in monoblue it works when there's a <pre> element (e.g. diff), but pages that use <table> element (annotate and compare) need this css class. It matches and highlights linked (":target") table rows. This line is pretty much copied from gitweb theme.

paper: remove css hack that made .branchname look like .branchhead There's a visual difference in hgweb between one changeset that is the tip of its branch and another that simply belongs to that branch. But paper theme ignored this difference on changeset page and used to always use "branchname" css class, be that changeset the tip of its branch or not. That has been recently fixed, so this piece of css is not needed anymore.

hgweb: rename the main attribute of instabilities Let's make "instabilities" list contain items with "instability" key as opposed to "name" key. This way it's more explicit and more consistent with the log command-line template.

hbisect: use a defaultdict to avoid large allocations for a large changelogs We can avoid a SPACE(len(changelog)) allocation by using a defaultdict. Test Plan: python run-tests.py test-bisect* Differential Revision: https://phab.mercurial-scm.org/D1499