e1e8c60af7
This adds tests to make sure that basic/env-util considers environment variables containing \r characters invalid, and that it removes such variables during environment cleanup in strv_env_clean*(). test-env-util has not verified this behaviour before. As \r characters can be used to hide information, disallowing them helps with systemd's security barrier role, even when the \r character comes as part of a DOS style (\r\n) line ending. Prompted-by: https://github.com/systemd/systemd/issues/17378
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