bundle: support multiple destinations `hg outgoing` and `hg push` now support multiple destination. We do the same for `hg bundle`. Various other commands needs this kind of behavior and it would be create to factor this code out for their usage. However this is an adventure for another time. They are some minor change to the tests (in addition to the new test for the feature): * one because I updated a message to plurals, * another one because the error changed, and I actually find it clearer. Differential Revision: https://phab.mercurial-scm.org/D10414

lfs: use the new APIs The part of the lfs store that requires a destination cannot operate on multiple destination (yet). So we move them to the dedicated APIs. Differential Revision: https://phab.mercurial-scm.org/D10413

fastannotate: use `get_unique_pull_path` The code does not support multiple destination yet, so lets move it to the dedicated API. Differential Revision: https://phab.mercurial-scm.org/D10412

remotefilelog: use the right expandpath in to expand `~` Given the context where path is most likely a file system path, I suspect that the initial author confused ui.expandpath and util.expandpath (a proxy for os.path.expanduser and co) Differential Revision: https://phab.mercurial-scm.org/D10411

transplant: use `get_unique_pull_path` The command does not support multiple destination (yet). Differential Revision: https://phab.mercurial-scm.org/D10410

infinitepush: use `get_unique_pull_path` The extension does not support multiple destination (yet). Differential Revision: https://phab.mercurial-scm.org/D10456

relink: use `get_unique_pull_path` The code does not support multiple destination and will probably never do so. So lets use the dedicated API for this case. Differential Revision: https://phab.mercurial-scm.org/D10409

histedit: use `get_unique_push_path` Same as for `pathbomb`, this code does not support multiple destinations yet. It might in the future, probably with code put in common with patchwork, but for now lets use the dedicated API. Differential Revision: https://phab.mercurial-scm.org/D10408

urlutil: add a new `get_unique_push_path` This function is dedicated to call that needs a single destination. Currently most caller actually need that since few actually support multiple destinations (the most importants `hg push` and `hg outgoing` do). So having a clear API point for that will be important when the time comes to have a single `[paths]` alias resolving to multiple urls. Differential Revision: https://phab.mercurial-scm.org/D10407

fetch: use `get_unique_pull_path` to retrieve the path The fetch command does not support multiple destination, so we use the new dedicated API for that. Differential Revision: https://phab.mercurial-scm.org/D10406