$docdev fixups: mostly to avoid empty output

... after auto-removing some kinds of files by default.
In some cases I let them be removed and in others I let them be put into
$docdev. That was more due to general indecisiveness on this question
than any reasons in the particular cases.

pkgs/desktops/xfce/core/exo.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
   name = "${p_name}-${ver_maj}.${ver_min}";
 
-  outputs = [ "dev" "out" "doc" ]; # dev-doc only
+  outputs = [ "dev" "out" "docdev" ];
     # lib/xfce4/exo-1/exo-compose-mail-1 is a perl script :-/
 
   nativeBuildInputs = [ pkgconfig intltool ];

pkgs/desktops/xfce/core/garcon.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "0wm9pjbwq53s3n3nwvsyf0q8lbmhiy2ln3bn5ncihr9vf5cwhzbq";
   };
 
-  outputs = [ "dev" "out" "doc" ];
+  outputs = [ "dev" "out" ];
 
   buildInputs = [ pkgconfig intltool glib libxfce4util gtk libxfce4ui ];
 

pkgs/desktops/xfce/core/libxfce4ui.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "3d619811bfbe7478bb984c16543d980cadd08586365a7bc25e59e3ca6384ff43";
   };
 
-  outputs = [ "dev" "out" "doc" ]; # dev-doc only
+  outputs = [ "dev" "out" "docdev" ];
 
   buildInputs =
     [ pkgconfig intltool gtk libxfce4util xfconf libglade

pkgs/desktops/xfce/core/libxfce4util.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "07c8r3xwx5is298zk77m3r784gmr5y4mh8bbca5zdjqk5vxdwsw7";
   };
 
-  outputs = [ "dev" "out" "doc" ]; # just dev-doc
+  outputs = [ "dev" "out" "docdev" ];
 
   buildInputs = [ pkgconfig glib intltool ];
 

pkgs/desktops/xfce/core/libxfcegui4.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "0cs5im0ib0cmr1lhr5765yliqjfyxvk4kwy8h1l8bn3mj6bzk0ib";
   };
 
-  outputs = [ "dev" "out" "doc" ]; # dev-doc only
+  outputs = [ "dev" "out" "docdev" ];
 
   #TODO: gladeui
   # By default, libxfcegui4 tries to install into libglade's prefix.

pkgs/desktops/xfce/core/tumbler.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "0wvip28gm2w061hn84zp2q4dv947ihylrppahn4cjspzff935zfh";
   };
 
-  outputs = [ "dev" "out" "doc" ]; # dev-doc only
+  outputs = [ "dev" "out" "docdev" ];
 
   buildInputs = [
     pkgconfig intltool dbus_glib gdk_pixbuf curl freetype

pkgs/desktops/xfce/core/xfce4-panel.nix

@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   patches = [ ./xfce4-panel-datadir.patch ];
   patchFlags = "-p1";
 
-  outputs = [ "dev" "out" "doc" ]; # just dev-doc
+  outputs = [ "dev" "out" "docdev" ];
 
   buildInputs =
     [ pkgconfig intltool gtk libxfce4util exo libwnck

pkgs/desktops/xfce/core/xfconf.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "0mmi0g30aln3x98y5p507g17pipq0dj0bwypshan8cq5hkmfl44r";
   };
 
-  outputs = [ "dev" "out" "doc" ]; # TODO: dev-doc only
+  outputs = [ "dev" "out" "docdev" ];
 
   #TODO: no perl bingings yet (ExtUtils::Depends, ExtUtils::PkgConfig, Glib)
   buildInputs = [ pkgconfig intltool glib libxfce4util ];