RFR [11u backport]: 8034802: (zipfs) newFileSystem throws UOE when the zip file is located in a custom file system

[Langer, Christoph]

Hello,

please help review this backport for 8034802 to jdk11u:

Bug: https://bugs.openjdk.java.net/browse/JDK-8034802
Original Commit: http://hg.openjdk.java.net/jdk/jdk/rev/ba51515b64e5
Original review thread: https://mail.openjdk.java.net/pipermail/core-libs-dev/2018-September/055490.html
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8034802.11u/

The patch did not apply cleanly - I had to manually resolve 3 hunks. Jtreg tests for zipfs all pass.

Thanks
Christoph