+allow_interactive contains a list of users that may log into the server via SSH,
+or that may issue arbitrary commands to the server via SSH. Instead of a list,
+the wildcard character '*' can be used to indicate all users. Note that this
+only affects users that have /usr/local/bin/repo_shell as their login shell.
+If the server is only hosting repositories, there is no reason for users to be
+allowed 'interactive' access.
+