clear LDAP cache after user deletion

[blizzz]

Before:

$ php occ user:delete person_133176
The specified user was deleted
$ php occ user:info 'person_133176' - user_id: person_133176
- display_name: Iris, Burns (person_133176)
- email: - cloud_id: person_133176@nc.zara/master
- enabled: true
- groups:
- quota: none
- last_seen: 1970-01-01T00:00:00+00:00
- user_directory: /path/to/data/person_133176
- backend: LDAP

(^ the data is even incomplete, e.g. no email)

Now:

$ php occ user:delete person_133176
The specified user was deleted
$ php occ user:info 'person_133176'
user not found

[blizzz]

/backport to stable19

[blizzz]

/backport to stable18

[blizzz]

/backport to stable17

[ChristophWurst]

https://www.martinfowler.com/bliki/TwoHardThings.html 😉

[blizzz]

https://www.martinfowler.com/bliki/TwoHardThings.html wink

This is incomplete. He forgot to mention off-by-one errors. At least the title is correct.