- replaced 'Also=' by 'Alias=' in display-manager.service

(bnc#890413)
- make sure not to restart DM on package update; remove confusing
  comment about no longer existing %%stop_on_removal,
  %restart_on_update macros from specfile (bnc#886641)

OBS-URL: https://build.opensuse.org/package/show/X11:XOrg/xdm?expand=0&rev=82

display-manager.service

@@ -15,4 +15,4 @@ KillMode=process
 
 [Install]
 WantedBy=graphical.target
-Also=xdm.service
+Alias=xdm.service