add the ajaxSetter option

[eiro]

provide a way to rearange the settings of the ajax request just before
sending the request.

there is no doc, no test and and it introduce at least one bug we need to talk about. (https://github.com/eiro/eiro.github.com/blob/master/notes/jquery-autocomplete.md) i i saw now developper mailing list. if you're interested, i'm eiro on freenode too.

regards

[Shnoulle]

We can not use included function for this ?

        beforeSend : function(jqXHR, settings) {
                // Update your settings here
            }
        },

I already used it with success.