Default ignore /etc/X11/default-display-manager about blueprint

[rcrowley]

Conversation with mrud confirms this file should be ignored.

[10:59:14] <mrud> CarlFK: its correct
[10:59:20] <mrud> |[~ ] -> cat /etc/X11/default-display-manager
[10:59:20] <mrud> |/usr/sbin/gdm3
[10:59:40] <@rcrowley> mrud: That's just the data point I was after, thanks!
[11:00:34] <@rcrowley> One probably wouldn't want to take a blueprint from CarlFK's box to mrud's without ignoring that file, so it seems like a good idea for it to be in the default ignore list.
[11:01:24] <mrud> rcrowley: why ignoring it?
[11:02:02] <mrud> ah i c because it is automatically created http://paste.pocoo.org/show/385945/
[11:02:03] <@rcrowley> mrud: Because in the overwhelming majority of cases, I expect differences in that file to be system-initiated, not user-initiated.
[11:02:10] <@rcrowley> Bingo!
[11:02:56] <mrud> |if [ "$OLD_DEFAULT" != "$CURRENT_DEFAULT" ]; then rm -f $DEFAULT_DISPLAY_MANAGER_FILE
[11:02:59] <mrud> |fi
[11:03:02] <mrud> k