plugin file sharing component: first draft:

this component act as an endpoint where a user can store and retrieve its files using Jingle.

src/plugins/plugin_misc_ip.py

@@ -45,6 +45,7 @@ PLUGIN_INFO = {
     C.PI_NAME: "IP discovery",
     C.PI_IMPORT_NAME: "IP",
     C.PI_TYPE: C.PLUG_TYPE_MISC,
+    C.PI_MODES: C.PLUG_MODE_BOTH,
     C.PI_PROTOCOLS: ["XEP-0279"],
     C.PI_RECOMMENDATIONS: ["NAT-PORT"],
     C.PI_MAIN: "IPPlugin",