Add support to limit results in get_objects_in_term()

[johnjamesjacoby]

The get_objects_in_term() function currently returns all object IDs related to a term in a taxonomy. On sites with many term relationships, this may result in tens of thousands of them.

Without a way to limit the results, developers currently need to write their own custom database query just to inject their own LIMIT clause.

Conveniently, the get_objects_in_term() function already has a third $args parameter that's currently only used to pass in a sort-order of ASC or DESC, so adding support for other query clauses is technically straight forward.

[mauteri]

Patch to add limit feature to $args for get_objects_in_term; unit tests included.

[mauteri]

Happened to be wondering the same thing while working with this function and saw this open ticket :-D