<i18n dev> [10] RFR JDK-8032842 and JDK-8175539: Locale.filterTags()/lookupTag() methods..., Duplicate matching tags returned...

[Nishit Jain]

Hi,

Please review the fix for JDK-8032842 and 8175539

Bug: https://bugs.openjdk.java.net/browse/JDK-8032842, 
https://bugs.openjdk.java.net/browse/JDK-8175539
Webrev: http://cr.openjdk.java.net/~nishjain/8032842_8175539/webrev.05/
CSR: https://bugs.openjdk.java.net/browse/JDK-8181073

Issue: Locale.filterTags()/lookupTag() methods were converting the case 
of input language tags and returning the lowercased language tags.
        Since the special range "*" matches every tag, all the input 
tags were directly returned without any additional processing, which 
might also contain duplicates.

Fix: Though matching process is done ignoring the case considerations, 
but the matched tag is returned by preserving its case as in the given 
input language tag(s).
      For language range "*", additional processing is added to remove 
the duplicate matching tags from the list of output tags.


Regards,
Nishit Jain