util: fix sorteddict.pop When using `.pop` on such object the list was not cleared of the popped key, leading to crash.

localrepo: pass arbitrary kwargs from `repo.pull` to `exchange.pull` We'll add bookmark-related arguments to `repo.pull` so we need to widen the signature of `repo.pull`. We should probably kill `repo.pull` now that `repo.push` is dead but this is outside the scope of this series.

pull: use `other.url()` as the source of a bookmark pull We want to move the bookmarks movement into `exchange.pull`, for this purpose we need to stop relying on variables from `command.pull`.