HPCC-32829 Avoid getPeerEndpoint refetchnig peer name

[jakesmith]

When a socket is attached the peer is captured in existing
member, reuse them in getPeerEndpoint/getPeerAddress.
This also means that these calls will continue to work
after the socket is closed. Therefore tracing of the peer
on a closed socket will now be valid.

Signed-off-by: Jake Smith [email protected]

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Testing:

[github-actions]

Jira Issue: https://hpccsystems.atlassian.net//browse/HPCC-32829

Jirabot Action Result:
Assigning user: [email protected]
Workflow Transition To: Merge Pending
Updated PR

[jakesmith]

@mckellyln - please review - left as 3 commits. The 1st is the key one - the main consequence is that the ISocket peer methods continue to work when a socket is being handled for a graceful close, which means that e.g. Dali can call them and trace the peer name. The current impls of getPeerEndpoint and its call to getpeername can fail with a 107.

[mckellyln]

Looks ok.
Approved.

[github-actions]

Jirabot Action Result:
Added fix version: 9.8.32
Workflow Transition: 'Resolve issue'