úÎŽ÷None  Is the input a valid host name? *Test the given parser on the given input.  A host name.  A name part.  A host part. Start of a host part. Match the character. ASCII letters and digits. Do all tests pass? Tests that should pass. Tests that should passfail.        hostname-validate-1.0.0 Text.Hostname validHostnametesthostnamelabel labelStartchardiglet testsPass correctTestsincorrectTests