Fixes <https://bugs.gnu.org/44808>. Reported by Christopher Lemmer Webber <cwebber@dustycloud.org>. * gnu/services/ssh.scm (true-but-soon-false): New procedure. (<openssh-configuration>)[password-authentication?]: Change default to 'true-but-soon-false'. * gnu/installer/services.scm (%system-services): Explicitly set 'password-authentication?' to #f.