awsetbg: add fvwm-root support

fvwm-root is a part of the FVWM window manager, and is one of those
utilities that properly support transparency because it can retain and
publish the Pixmap with which the background has been set. It supports
XBM, XPM, PNG and SVG image formats, but is not very rich in options
as opposed to habak or feh.

Signed-off-by: Adrian C. (anrxc) <anrxc@sysphere.org>
Signed-off-by: Julien Danjou <julien@danjou.info>

utils/awsetbg

@@ -53,7 +53,7 @@ else
 fi
 
 # The wallpapersetter is selected in this order
-wpsetters="${wpsetters:=Esetroot habak wmsetbg feh hsetroot chbg display qiv xv xsri xli xsetbg xsetroot}" # broken icewmbg'
+wpsetters="${wpsetters:=Esetroot habak wmsetbg feh hsetroot chbg fvwm-root display qiv xv xsri xli xsetbg xsetroot}" # broken icewmbg'
 lastwallpaper="${CONFIG_DIR}/lastwallpaper"
 
 
@@ -334,10 +334,10 @@ if [ "$setterfromcommandline" != true ]; then
 fi
 
 standardrant=\
-"$WPSETTER doesn't set the wallpaper properly. Transparency for awesome and
-apps like aterm and xchat won't work right with it. Consider installing
-feh, wmsetbg (from windowmaker) or Esetroot (from Eterm) and I'll use
-them instead."
+"$WPSETTER doesn't set the wallpaper properly. Transparency for
+awesome and apps like aterm and xchat won't work right with
+it. Consider installing feh, wmsetbg (from windowmaker), Esetroot
+(from Eterm) or fvwm-root (from FVWM) and I'll use them instead."
 
 standardok=\
 "$WPSETTER is a nice wallpapersetter. You won't have any problems."
@@ -427,6 +427,15 @@ case $WPSETTER in
         aspect='-mS'
         debugstory=$standardok
         ;;
+    fvwm-root)
+        tile='-r'
+        full=$tile
+        center=$tile
+        aspect=$tile
+        debugstory="fvwm-root can retain and publish the Pixmap, thus
+supports transparency. But only these image formats are supported:
+XBM, XPM, PNG, SVG and it is rather limited with options."
+        ;;
     icewmbg)
         tile='-s'
         full=$tile