Comment # 7 on bug 1176338 from Dominique Leuenberger

Attempted to submit a fix:

835190  State:new        By:dimstar      When:2020-09-17T12:25:44
        submit:          home:dimstar:Factory/lightdm@3 ->                 
X11:Utilities
        Descr: - Follow XDM's change of moving the default pam config file to
               /usr/etc (boo#1176338).   - Add pre/posttrans scripts to ensure
               user modified     /etc/pam.d/lightdm* survives our move to
               /usr/etc (and user     modification in /etc/pam.d wins over
               /usr/etc/pam.d).

will fail to build in devel prj, as it needs to be step-lock updated together
with xdm, but that's ok