tinyproxy: handling of option XTinyproxy

1.) Fix the handling of XTinyproxy option to avoid syntax error when starting tinyproxy:

example:
Syntax error on line 15
Unable to parse config file. Not starting.

Signed-off-by: Mathieu Coupe <eagle.pounains@gmail.com>

net/tinyproxy/files/tinyproxy.init

@@ -50,7 +50,7 @@ start_proxy() {
 
 	proxy_atom "$1" LogLevel >> $CFGFILE
 
-	proxy_list "$1" XTinyproxy >> $CFGFILE
+	proxy_flag "$1" XTinyproxy >> $CFGFILE
 
 	proxy_atom "$1" MaxClients >> $CFGFILE
 	proxy_atom "$1" MinSpareServers >> $CFGFILE