templates: add built-in files() function We already support multiple primitive for listing files, which were affected by the current changeset. This patch adds files() which returns files of the current changeset matching a given pattern or fileset query via the "set:" prefix.

rebase: rebase changesets in topo order (issue5370) (BC) There are two reasons that rebase should be done this way: 1. This would make rebasing faster because it would minimize the total number of files to be checked out in the process, as it don't need to switch back and forth between branches. 2. It makes resolving conflicts easier as user has a better context. This commit changes the behavior in "Test multiple root handling" of test-rebase-obsolete.t. It is an expected change which reflects the new behavior that commits in a branch are grouped together when rebased.

dispatch: make hg --profile wrap reposetup Move profiling.maybeprofile() from _runcommand to _dispatch() so that profiler output will include reposetup.