Add IN filter function taking variable number of arguments

Description

We already have a series of inX functions where X goes from 2 to 10, which take X arguments.

However, in some cases the number of arguments is not known beforehand and so it would be useful to have a generic in function taking a variable number of arguments.

The new function could be easily backported to the stable and maintenance branches.

Environment

None

Assignee

Stefano Costa

Reporter

Stefano Costa

Triage

None

Components

Fix versions

Affects versions

Priority

Medium
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