Werk #16309: Fix error on update if LDAP connection ID contains spaces

With werk #15815 LDAP connection IDs are validated and rewritten if they contain spaces (possible in 2.1).

Such connection IDs resultet in sync_time files in the web dir, also containing spaces and lead to an error on user ID validation if you update from 2.1 to 2.2.

This files are now also renamed during the update.

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