[xmpp] Client has a autoconnect option to automatically perform the connection to XMPP server.
provided_by_xpath in replay file start with the node_id (instead lfm_host).
[smart] Provide.ignore_error_on_variable() can be overloaded to ignore some variables validation.

This is used to ignore 'armonic_host' validation at configuration time since
they could just be known at deployment time. In this case, they will
be "translated" and will become valid at deployement time.

Maybe, we should create a new section in replay file for this kind of variables.
[smart] Section variables_host in replay file has been added.

This section contains variables which have to be translated (from jid
to IP for instance).
IMPORTANT: The input support of this section is not implemented yet...