Allow passing arguments down to dmenu

bin/eedmenu.in

 FFOO_INI_PATH="__FFOO_INI_PATH__"
 
 usage() {
-    usage_is "[-l|--lines NUM] [-s|--split CHAR]"
+    usage_is "[-l|--lines NUM] [--split CHAR] ARGS..."
 }
 
 numbered=false
 maybe_split=cat
 
 while true; do case $1 in
-    -l|--lines)         lines=$2; shift 2 ;;
-    -s|--split)         delim=$2; shift 2 ;;
-    "")                 break             ;;
-    *)  usage
+    -l|--lines)     lines=$2; shift 2 ;;
+    --split)        delim=$2; shift 2 ;;
+    --help|--usage) usage             ;;
+    *)              break             ;;
 esac done
 
 test -n "$delim"        && maybe_split=do_split
     cut -d$delim -f2-
 }
 
-dmenu -l $lines $style \
-  | $maybe_split
+dmenu -l $lines $style "$@" | $maybe_split