Revamp eedmenu to be more flexible

eedmenu now does not use special parameter for ini reading.  INI can be
used but we expect user to send it on STDIN (probably using eeini) just
as any other (delimited) file.

bin/eedmenu.in

 FFOO_INI_PATH="__FFOO_INI_PATH__"
 
 usage() {
-    usage_is "[-l|--lines] [-d|--delim] [-e|--read-eeini]"
+    usage_is "[-l|--lines NUM] [-s|--split CHAR]"
 }
 
 numbered=false
 lines=10
-maybe_cut=cat
-maybe_read_eeini=cat
+maybe_split=cat
 
 while true; do case $1 in
-    -l|--lines)         lines=$2;                   shift 2 ;;
-    -d|--delim)         delim=$2;                   shift 2 ;;
-    -e|--read-eeini)    read_eeini=$2; delim='=';   shift 2 ;;
-    "")                 break                               ;;
+    -l|--lines)         lines=$2; shift 2 ;;
+    -s|--split)         delim=$2; shift 2 ;;
+    "")                 break             ;;
     *)  usage
 esac done
 
-test -n "$delim"        && maybe_cut=do_cut
-test -n "$read_eeini"   && maybe_read_eeini=do_read_eeini
+test -n "$delim"        && maybe_split=do_split
 
 host=$(hostname -s)
 nb="$(iniread -p style.color.nbg)"
 arg_fn="${fn:+-fn $fn}"
 style="$arg_nb $arg_nf $arg_sb $arg_sf $arg_fn"
 
-do_cut() {
+do_split() {
     cut -d$delim -f2-
 }
 
-do_read_eeini() {
-    iniread $read_eeini
-}
-
-$maybe_read_eeini \
-  | dmenu -l $lines $style \
-  | $maybe_cut
+dmenu -l $lines $style \
+  | $maybe_split