Downgrade DNS errors to warnings (#17) #27

Job	Run time
Run Clippy	30s
Run Rustfmt	13s
Run RustDoc	59s
Run Cargo Deny (advisories)	23s
Run Cargo Udeps	1m 14s
Run Cargo Deny (bans licenses sources)	23s
Run Cargo Tests	23s
All tests passed	1s
	4m 6s

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