80 characters line len

Clone from public URL

Reported upstream: https://we.phorge.it/T15953

Missing PHP extensions (optional dependencies):

set -e is the one to exist on any error

Fix whitespaces

Part of the answer :
https://pad.nasqueron.org/p/KeyCloak#L4

Changing error message into stderr

Change the link of the documentation

Updates Alp file names and correct php files for class mapping

works correctly on my MacBook Air (13-inch, 2017)

s/ttps/https/g

Probably interesting to replace redis by valkey per T1938.

Without performance benchmark, the expected gain is not obvious.

Do we?

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