and `frac_auth_frag_valid_op_1_l`, add `frac_auth_frag_op_validN` and
`frac_auth_frag_op_valid`, which are bi-implications with arbitrary fractions.

- Rename `excl_auth_frag_validN_op_1_l` into `excl_auth_frag_op_validN` and
  `excl_auth_frag_valid_op_1_l` into `excl_auth_frag_op_valid` (similar to
  `auth_auth_op_valid`, and make them bi-implications.
- Add `excl_auth_auth_op_validN` and `excl_auth_auth_op_valid`

Fupd soundness lemmas always generate credits

See merge request iris/iris!815

document wp_smart_apply

See merge request iris/iris!811

add proofmode instances for le_upd

See merge request iris/iris!813

fix le_upd notation

See merge request iris/iris!812

First Steps for Later Credits

See merge request !792

not really a fully compatible replacement. we should really have an example use of this somewhere here...

This partially reverts commit 9274f33d1c040e9b86383e769d86aa6d6a915d70.
The pattern is bogus, it blocks other patterns from running after empty lines.

make iAuIntro smarter

See merge request !806

adjust proofmode of_envs to rely less on persistently_emp_2

See merge request !794

Add `Absorbing` instances for `[∧ list]`.

See merge request !805