Bug#701477: Use dedicated subfolders

[Lanoxx <lanoxx@gmx.net>]

I suggest to use dedicated subfolders in each of the XDG folders. For 
example:

XDG_CONFIG_HOME/lintian/lintianrc or simply
XDG_CONFIG_HOME/lintian/rc

This will make it easier to add additional configuration files in the 
future and collect them in the lintian folder.

Besides that, you can have a look at 
https://live.gnome.org/GnomeGoals/XDGConfigFolders there is an extensive 
collection of Gnome and NON-Gnome applications that have implemented the 
XDG-Specs in the past, including explanations about how to implement 
this spec and why its useful.

Regards
Lanoxx