Always skip ssl validation when using a self-signed certificate #438

Job	Run time
Check formatting	5s
Compile on MSRV	1m 5s
Check clippy	1m 6s
Run integration tests (5)	6m 1s
Run integration tests (4.4)	5m 56s
Validate MSRV and minimal dependency versions (Cargo.lock.msrv, MSRV)	37s
Run unit tests (windows-latest)	6m 15s
Validate MSRV and minimal dependency versions (Cargo.lock.min, minimal dependency versions)	35s
Run unit tests (macOS-latest)	1m 47s
Run unit tests (ubuntu-latest)	1m 40s
Release	0s
	25m 7s

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