media content order is relevant when building Jingle contents/SDP notably for bundling.
This patch fixes the previous behaviour of always using the same order by keeping the
order of the data (i.e. order of original SDP offer). Previous behaviour could lead to
call failure.
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- add a `jingle_preflight_info` method in the Jingle Application model to handle this kind
of information
- XEP-0353 is calling `jingle_preflight_info` when a `ringing` message is received
- XEP-0167 use this information to send a `ringing` info to frontends
- XEP-0166: add `jingle_preflight` and `jingle_preflight_cancel` methods to prepare a
jingle session, principally used by XEP-0353 to create and cancel a session
- XEP-0167: preflight methods implementation, workflow split in more methods/signals to
handle UI and call events (e.g.: retract or reject a call)
- XEP-0234: implementation of preflight methods as they are now mandatory
- XEP-0353: handle various events using the new preflight methods
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- a new `jingle_terminate` bridge method let frontend terminate a session
- methods to manage a session from another plugin
- methods to parse `<reason>` element from another plugin
- allow session to be created before a first jingle request is received, to prepare for
`preflight` methods
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`render_OPTIONS` is a method inherited from Twisted, name has been put to lowercase
following massive refactoring, resulting in the method not being called anymore. This
patch fixes it.
the gateway was supposing that comments where emitted from PEP of author. While this is
the case for most blog posts, it's not for comments. Instead the component is now using
`author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is
not verified (i.e. if `publisher` attribute is not set by XMPP service).
