Note that using % in a string will _always_ perform the sting substitutions, because the strings are constructed before the function is called. So log.debug('%s' % expensiveoperation()) will take about the same CPU time whether or not the logging level is DEBUG or INFO. if you use , no substitutions are performed unless the string is actually logged
Methods now accept either an ifrom or mfrom parameter
to specify a 'from' value. Client connections should not
need to use these, but component connections must use them.
It is now possible to ask for "any number of history stanzas" when
joining a muc (with history=None).
Also we use "maxchars" when asking NO history ("0") since it's a MUST in
the XEP.
And you can specify a message when leaving a MUC.
* added stanza unhandled (unhandled iqs now reply with feature-not-implemented)
* added stanza exceptions (stanzas may now reply with exceptions when their handler raises an exception)
* sleekxmpp no longer spawns threads for callback handlers -- there are now two threads: one for handlers and one for reading. callback handlers can get results from the read queue directly with the "wait" handler which is used in .send() for the reply catching argument.
