Support multiple entries for nameFilters.

Idea created by gregor.vilkner on Dec 12, 2017
    Originally posted on UserVoice

    We would like to GET elements/id/attributes?nameFilter=attr1name;attr2name;attr3name - like an OR statement in SQL. This would be consistent with selectedFields=webid;path;name

    Currently we would have to either make more or heavier batch calls, or micromanage with categories, or strategically rename attributes to allow wildcard nameFilters like attr?name above.

    Kind regards, Gregor