Hello All,

Please review the following fix for JDK 16:

Bug : https://bugs.openjdk.java.net/browse/JDK-8243674 
<https://bugs.openjdk.java.net/browse/JDK-8243674> 
Webrev : http://cr.openjdk.java.net/~jdv/8243674/webrev.00/ 
<http://cr.openjdk.java.net/~jdv/8243674/webrev.00/> 

Issue : We have language tag length limit of 80 for iTXt chunk in 
PNGImageReader which is not spec 
compliant(http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html#C.iTXt 
<http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html#C.iTXt>). There should 
not be limit on length of language tag.
Solution : Remove language tag restriction of 80. In PNGImageWriter we don’t 
enforce any limit on language tag length.

Thanks,
Jay

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