Fixes #319

This helps async proof checking (see
iris/iris!406 (comment 46759)).

Done with
```
gsed -i 's/seal \(.*\)\. by eexists. Qed./seal \1. Proof. by eexists. Qed./' \
  $(find theories/ -name '*.v')
```

And checked by inspecting the output of:
```
git grep '\bseal\b'|fgrep -v 'Proof. by eexists. Qed.'
```

Gregory Malecha authored 5 years ago and Robbert Krebbers committed 5 years ago

- remove "odd" comment
- move atomic triples to bi_scope

Use `_inv` for the reverse direction.

This feature is now deprecated in Coq master (see
https://github.com/coq/coq/pull/7791).

Instead of passing a partially-applied lemma directly to Hint Resolve,
first create a definition and then make that reference a hint.

Also refactor the proofs to make better reuse of existing lemmas.

This fixes the problem in iris/iris!275 (comment 42062)