Add some comments and replace get_post_args with load_post_args

lib/_debug.tpl

@@ -1,6 +1,29 @@
-<pre>
-% env | escape_html
----------------------
-% umask
-</pre>
+% if(! ~ $#debug_shell 0) {
+<form method="POST" name="prompt">
+<input type="text" name="command" />
+<input type="submit" Value="Run" />
+</form>
+<script language="javascript"><!--
+document.prompt.command.focus()
+//--></script>
+
+%{
+fn evl {
+    # Buffering is probably messing this up:
+    #rc -c 'flag x +;{'^$post_arg_command'} |[2] awk ''{print ">> "$0}'''
+    rc -c 'flag x +;'^$post_arg_command
+}
+    if(! ~ $#post_arg_command 0 && ! ~ $#post_arg_command '') {
+        echo '<hr /><pre>'
+        evl | escape_html |[2] awk '{print "<b>"$0"</b>"}' 
+        echo '</pre>'
+    }
+%}
+% }
+
+<hr /><pre>
+% env | escape_html
+</pre><hr />
+
+% umask