Codereview request 7156873: (zipfs) FileSystems.newFileSystem(uri, env) fails for uri with escaped octets

[Xueming Shen]

Hi

Please help review the fix for 7156873.  It appears 
URI.getRawSchemeSpecificPart() is the more appropriate
method to use to obtain the "scheme", which returns the scheme in its 
"quoted" form.

http://cr.openjdk.java.net/~sherman/7156873/webrev

Thanks,
-Sherman