wintext: use rc not bash

bin/wintext

@@ -1,22 +1,17 @@
-#!/bin/bash
+#!/usr/local/plan9/bin/rc
 
-case "$winid" in
+if(~ $winid [0-9]*) {
-[0-9]*)
 	9p read acme/$winid/body
 	exit 0
-esac
+}
-
+if(~ $text9term 'unix!'*) {
-case "$text9term" in
+	dial -e $text9term < /dev/null
-unix!*)
-	dial -e $text9term </dev/null
 	exit 0
-esac
+}
-
+if(~ $TMUX ?*) {
-case "$TMUX" in
-?*)
 	tmux capture-pane -p
 	exit 0
-esac
+}
 
-echo 'no running window found' 2>&1
+echo 'no running window found' >[2=1]
 exit 1