Check_MK Werk 6840: sshd_config: change the option without-password to key-based

ID: 6840 Title: sshd_config: change the option without-password to key-based Component: Checks & agents Level: 1 Class: Bug fix Version: 1.6.0i1 In the sshd_config the options without-password and prohibit-password are equivalent. Therefore, we transform the old Check_MK option without-password to the new option key-based which represents both values.