Don't further setup disabled users when logging in with apache

[nickvergessen]

Steps

1. Set up SAML
2. Create a saml user
3. Disable the saml user
4. Try to login as the saml user

Before

1. Infinite redirect: Infinite redirect when user is disabled user_saml#549
2. Admin audit logs a successful login:

{"reqId":"YUxAmk6ad8CsAHoiDyFoMAAAAAM","level":1,"time":"2021-09-23T10:53:46+02:00","remoteAddr":"127.0.0.1","user":"admin","app":"admin_audit","method":"PUT","url":"/ocs/v2.php/cloud/users/saml1/disable","message":"User disabled: \"saml1\"","userAgent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0","version":"23.0.0.1"}
{"reqId":"YUxA7k6ad8CsAHoiDyFoNAAAAAM","level":1,"time":"2021-09-23T10:55:10+02:00","remoteAddr":"127.0.0.1","user":"--","app":"admin_audit","method":"GET","url":"/","message":"Login attempt: \"saml1\"","userAgent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0","version":"23.0.0.1"}
{"reqId":"YUxA7k6ad8CsAHoiDyFoNAAAAAM","level":1,"time":"2021-09-23T10:55:10+02:00","remoteAddr":"127.0.0.1","user":"saml1","app":"admin_audit","method":"GET","url":"/","message":"Login successful: \"saml1\"","userAgent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0","version":"23.0.0.1"}

After

1. User sees default screen:

Error

User disabled

2. Admin audit logs only the login attempt, no successful login:

{"reqId":"YUxGTMunf0qR2-3A3U3I2wAAAAU","level":1,"time":"2021-09-23T11:18:04+02:00","remoteAddr":"127.0.0.1","user":"--","app":"admin_audit","method":"GET","url":"/","message":"Login attempt: \"saml1\"","userAgent":"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0","version":"23.0.0.1"}

[nickvergessen]

/backport to stable22

[nickvergessen]

/backport to stable21

[nickvergessen]

/backport to stable20

[backportbot-nextcloud]

The backport to stable21 failed. Please do this backport manually.

[backportbot-nextcloud]

The backport to stable20 failed. Please do this backport manually.