Merge branch 'hotfix/#6849-fix-db-predicate-expression-method-argument-handling'

Close #6849
#6896 - `$_SERVER['HTTPS']` may have uppercase value `"OFF"`
#6896 -  adding missing `@group` annotation
Fix for https cases for Apache on IBM i

On Apache on IBM i the `$_SERVER['HTTPS']` is set to `OFF` instead of `off` (lowercase).
I've added the strtolower to prevent cases like that.
Merge branch 'hotfix/#6896-ibmi-https-flags-in-environment-request' into develop

Close #6896
Forward port #6896