Update discover single to handle hostnames #539
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bdraco
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rytilahti
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Never realized that this wasn't already working as initializing device instances manually just worked(tm) 👍
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While looking at merged PR #528 I noticed some users were using hostnames to add their devices and the current discover_single will not work with hostnames. This PR does a simple DNS lookup using getaddrinfo if a hostname is used so that it can match to the datagram response ip.
According to the getaddrinfo docs dns lookup only happens if node parameter is a hostname: