GHSA-FG3J-5W9G-HMG7 authd: Primary group ID is incorrectly set to value of UID

authd 0.6.0 contains a bug which can lead to an incorrect primary group ID. It affects users whose primary group ID i.e. the GID in the user record differs from their UID. There are two ways which can lead to this: 1. The user was created with authd &2 continue fi if "$OLDGID"...