If I understand you correctly, I think what you want is the following:

@finfo=split(/(\n{2,})/, <IFILE>);   #<+++++
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From split:

If the PATTERN contains parentheses, additional list elements are created from each matching substring in the delimiter.

    split(/([,-])/, "1-10,20", 3);
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produces the list value

    (1, '-', 10, ',', 20)
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