* During push, automatically calculate which .origs are required,
so user never needs [--ch:]-sa or [--ch:]-sd. Closes:#829116.
* Properly look for .origs etc. in .., fetching them less often.
+ Closes:#842386.
* New import-dsc feature.
* Test suite: Explicitly configure user.name and user.email, so
that tests work when environment doesn't have defaults.