author import: handle duplicate ids #1180
Merged
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When reading 00whois.xml, there can be cpanid elements containing duplicate id element values. This can happen when there is both a list and author entry for the same name. In these cases, the author entry is extraneous.
Rather than relying on XML::Simple's built in array to hash transformation (using id values), do the work ourselves so we can handle the duplicate id entries. Also configure XML::Simple to be more strict about how it parses.