openconnect: list the defaultroute option

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

net/openconnect/README

@@ -12,6 +12,7 @@ config interface 'MYVPN'
         option serverhash 'AE7FF6A0426F0A0CD0A02EB9EC3C5066FAEB0B25'
         option token_mode 'rsa' # when built with stoken support
         option token_secret 'secret' # when built with stoken support
+	option defaultroute '0'
         option authgroup 'DEFAULT'
 
 The additional files are also used: