Fix NetUtils: should be ignore link-local address

[cyclinder]

What is the purpose of the change?

NetUtils: should be ignore link-local address

Fixes #14792

Checklist

• Make sure there is a GitHub_issue field for the change.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Make sure gitHub actions can pass. Why the workflow is failing and how to fix it?

[heliang666s]

LGTM

[AlbumenJ]

What would happen if there is no any non-local interface

[cyclinder]

if there is no non-local address, address.isLinkLocalAddress() would return false, This function wouldn't return directly, Continue with the logic below, same as if it was a lookback address.

[yunmaoQu]

@AlbumenJ Just suggesstion:add a parameter called "allowLinkLocal(boolean)" in some related method( i find two extend point from original structure) .And user can config the value in system config file while it's default value is true to prevent the situation that though there is no any non-local interface and it also work , it's ok?

[yunmaoQu]

i've done the work in local,if my idea is available and need my code ,i 'll push a request under this issue!

[cyclinder]

Refer to https://github.com/apache/dubbo/pull/14793/files#r1814182854, address.isLinkLocalAddress() shouldn't affect if there is no non-local address. I don't have a Dubbo environment locally, Can you help test the changes? thanks a lot.