enable XDG support

Packages describing “xdg” as local USE flag

Package “xdg” Flag Description
games-fps/quakeforge enable XDG support
app-misc/mc Toggles mc's config dir location. Enable for $XDG_CONFIG_HOME/mc, disable for $HOME/.mc
dev-perl/File-HomeDir Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs
x11-wm/openbox Install the python xdg files for xdg autostart

All packages providing a “xdg” USE flag (2)