Bug#1408: xfig always asks about colour/mono

[Ian Jackson <iwj10@cus.cam.ac.uk>]

Package: xfig
Version: 3.1.3-4

 Setting up xfig ...
 There are two application defaults (app-defaults) files for xfig -- Xfig-mono
 and Xfig-color.  Which one would you like to use? [c/m] c
 Linking Xfig-color to Xfig...done

 [later]

 chiark:binary> really dpkg -i graphics/xfig-3.1.3-4.deb
 (Reading database ... 16249 files and directories currently installed.)
 Preparing to replace xfig (using graphics/xfig-3.1.3-4.deb) ...
 Unpacking replacement xfig ...
 Setting up xfig ...
 There are two application defaults (app-defaults) files for xfig -- Xfig-mono
 and Xfig-color.  Which one would you like to use? [c/m] c
 Linking Xfig-color to Xfig...done

It should only ask once, and it should put the link in /etc (in
/etc/alternatives or /etc/X11, probably) so that it can be
reconfigured by the sysadmin.   The postrm should remove the link from
/etc when invoked with `purge' (see maintainer-script-args.txt).

Ian.