Werk #15024: "+" is now an allowed character in user ids

Component Setup
Title "+" is now an allowed character in user ids
Date Oct 23, 2023
Checkmk Version 2.3.0b1
Level Trivial Change
Class New Feature
Compatibility Compatible - no manual interaction needed
Affected Editions
2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

"+" has been added as an allowed character in user ids. For example now "user+checkmk@company.com" is an allowed user id.

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