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The opensource project Jwala is currently using Cygwin and OpenSsh to manage web and application servers. The application is currently deployed in production environments and has experienced ssh login problems due to the username changing case from time to time . Initial deployment of Cygwin and OpenSsh in a Windows environment is initially fine, ssh accepts any case. Later on, sshd will complain that auth failed due to the username comparison failure since the username that getpwnam returns in now in a specific case which does not necessarily equal that of active directory's (It would have been okay if it did equal active directory's username case since we'll just follow it). As a summary, the pull request's goal is to give users of OpenSsh in Cygwin/Windows the option of having the username case sensitivity configurable to mitigate the above mentioned issue without changing anything in Cygwin or Windows.