rtty: Add package

A reverse proxy WebTTY. It is composed of the client and the server.

Signed-off-by: Jianhui Zhao <jianhuizhao329@gmail.com>

utils/rtty/files/rtty.config

@@ -0,0 +1,12 @@
+# You must specify an interface or id,
+# If the id is not specified, RTTY will uses the MAC address
+# of the interface you specify as its ID, otherwise the id
+# you specify is used as its ID
+
+#config rtty
+#   option  interface   'lan'
+#   option  id          'My-Device'
+#   option  description 'Description of my device'
+#   option  host        'your-server-host'  # Server host
+#   option  port        '5912'              # Server Port
+#   option  ssl         1                   # Whether to use ssl