Review Request for JDK-8003992: File and other classes in java.io do not handle embedded nulls properly

[Dan Xu]

Hi All,

Please help review the fix for JDK-8003992: File and other classes in 
java.io do not handle embedded nulls properly.

Java IO, not like NIO, does not check NUL character in the given file 
path name, which brings confusion to Java users. This fix is going to 
address this issue by removing any NUL character from the given file 
path. And it also cleans and optimizes the path-name normalization 
logic. Thanks!

Bug: https://jbs.oracle.com/bugs/browse/JDK-8003992
webrev: http://cr.openjdk.java.net/~dxu/8003992/webrev.00/

-Dan