Logging and close race in RPC client#661

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JHartman5 wants to merge 12 commits into

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boxcast:logging-and-close-race

Commits on Aug 8, 2022

Bugfix: fix 'panic: close of closed channel' by atomically swapping the 'closed' member of RPC client handler structs
JHartman5
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Also give the init members the same treatment, and use CompareAndSwap instead of just Swap
JHartman5
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Commits on Aug 24, 2022

Minor refactoring for comments and readability
JHartman5
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