backend, frontend: prepare remote control: This is a series of changes necessary to prepare the implementation of remote control feature: - XEP-0166: add a `priority` attribute to `ApplicationData`: this is needed when several applications are working in a same session, to know which one must be handled first. Will be used to make Remote Control have precedence over Call content. - XEP-0166: `_call_plugins` is now async and is not used with `DeferredList` anymore: the benefit to have methods called in parallels is very low, and it cause a lot of trouble as we can't predict order. Methods are now called sequentially so workflow can be predicted. - XEP-0167: fix `senders` XMPP attribute <=> SDP mapping - XEP-0234: preflight acceptance key is now `pre-accepted` instead of `file-accepted`, so the same key can be used with other jingle applications. - XEP-0167, XEP-0343: move some method to XEP-0167 - XEP-0353: use new `priority` feature to call preflight methods of applications according to it. - frontend (webrtc): refactor the sources/sink handling with a more flexible mechanism based on Pydantic models. It is now possible to have has many Data Channel as necessary, to have them in addition to A/V streams, to specify manually GStreamer sources and sinks, etc. - frontend (webrtc): rework of the pipeline to reduce latency. - frontend: new `portal_desktop` method. Screenshare portal handling has been moved there, and RemoteDesktop portal has been added. - frontend (webrtc): fix `extract_ufrag_pwd` method. rel 436

================================
uri: XMPP URI parsing/generation
================================

URI commands are helper to easily parse/build XMPP URIs.

parse
=====

Parse an XMPP URI, and print different parts.

When possible, the ``type`` of URI is shown (e.g. ``pubsub``) and the ``sub_type`` (e.g.
``microblog``).

The ``path`` is always displayed (see `RFC 5122 Path section`_ for details).

If suitable, you'll also get data like ``node`` (for a PubSub URI).

.. _RFC 5122 Path section: https://tools.ietf.org/html/rfc5122#section-2.4

examples
--------

Parse a blog URI::

  $ li uri parse "xmpp:somebody@example.org?;node=urn%3Axmpp%3Amicroblog%3A0"

build
======

Build an XMPP URI according to arguments. 2 positional arguments are expected: ``type``
and ``path``. For now, only ``pubsub`` type is supported.

examples
--------

Build XMPP URI for a blog::

  $ li uri build pubsub somebody@example.org -f node urn:xmpp:microblog:0