Relational operators with strlst changed - Caveat

The use of relational operators (<, >, = etc.) with strlst values has been clarified somewhat in version 7. While usage with strlst is discouraged - as strlst values are set-like but the relational operators are for scalars - a strlst relational expression will now generally compare the two strlsts as atomic entities, promoting the non-strlst side if present (as a single item). Version 6 behavior is restored if <vxcp compatibilityversion> is set to 6.

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