[patch] legacy dirs support for xfdesktop

[Brian J. Tarricone]

hi all-
whipped up a patch to have the autogenerated menu for xfdesktop search 
the old gnome/kde legacy dirs ($prefix/share/gnome/apps and 
$prefix/share/applnk).  it's up at:
http://kelnos.homelinux.org/xfce4/files/xfdesktop-legacydirs-20040228.diff

please test and let me know how it works for you.  i'm going to add an 
option to disable the code, since it doesn't do the greatest job of 
categorising some of the crappier-placed entries (unfortunately, no way 
around it).

    -brian