Final head of the former 2.1 branch

1. 2219afc bit vector is now implemented by Guido van Rossum · 33 years ago
2. 411588c sv now raises sv.error, not RuntimeError by Guido van Rossum · 33 years ago
3. be0cba4 Made it work with the sub-spec burst capture interface (no bit vector) by Guido van Rossum · 33 years ago
4. 44c1f69 Added more info by Guido van Rossum · 33 years ago
5. db96c5a Initial revision by Guido van Rossum · 33 years ago