[jdk11u-dev] RFR: 8297569: URLPermission constructor throws IllegalArgumentException: Invalid characters in hostname after JDK-8294378

[Goetz Lindenmaier]

I backport this for parity with 11.0.19-oracle.

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Depends on: https://git.openjdk.org/jdk11u-dev/pull/1650

Commit messages:
 - Backport 2f47f83addd7f69db2c7070552a7ec67bd07d62e

Changes: https://git.openjdk.org/jdk11u-dev/pull/1651/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1651&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297569
  Stats: 7 lines in 3 files changed: 2 ins; 3 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1651.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1651/head:pull/1651

PR: https://git.openjdk.org/jdk11u-dev/pull/1651