Motivation:
NetUtil.isValidIpV6Address() handles the interface name in IPv6 address
incorrectly. For example, it returns false for the following addresses:
- ::1%lo
- ::1%_%_in_name_
Modifications:
- Strip the square brackets before validation for simplicity
- Strip the part after the percent sign completely before validation for
simplicity
- Simplify and reformat NetUtilTest
Result:
- The interface names in IPv6 addresses are handled correctly.
- NetUtilTest is cleaner
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