hgweb: fix incorrect way to count revisions in log (issue3977) Actual amount of revisions is used now instead of their numbers in the repo before to deal with skipped numbers correctly. This iterates starting from the newest revision (which is shown on top) yielding up to the specified count, instead of the reversed order used before. Effect of this change on efficiency is negligible, when the same changesets are returned.

hgweb: always start graph with the revision in url It is the same fix for graph command, as was recently for log. This makes the specified revision be always on top of the graph view. Before the patch, for example with repo having revisions 0, 1, 2, 3 and revision in url being '2', all revisions were shown and the specified one wasn't the first.