p2p: Add "feeler" connection #12
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To update the metadata of an address book, it is common to open one-time connections to check a peer's service flags and up-time without actually maintaining a connection. Add a utility to do that here.
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To update the metadata of an address book, it is common to open one-time connections to check a peer's service flags and up-time without actually maintaining a connection. Add a utility to do that here.