isisd: The neighbor entry still displays the deleted hostname of the neighbor.

[zhou-run]

1. The lsp_update_data() function will check for the presence of the ISIS_TLV_DYNAMIC_HOSTNAME in the LSP, and then call isis_dynhn_insert() to add a hostname entry corresponding to the LSP ID. However, when the ISIS_TLV_DYNAMIC_HOSTNAME is not present in the LSP, the hostname entry corresponding to the LSP ID should also be deleted.
2. The command “show isis neighbor” invokes isis_adj_name() to display the System ID or hostname, but it does not check the area->dynhostname flag.

Signed-off-by: zhou-run [email protected]

[ton31337]

Seems that tests should be updated/fixed too.

[zhou-run]

Seems that tests should be updated/fixed too.

Yes, I am currently investigating why the hostname entry is being lost in the case of the area->dynhostname being enabled.

[github-actions[bot]]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[ton31337]

@frrbot rereview

[riw777]

failing in ospf; rerunning just the failed tests to see if we can clear them