MAJOR: session: check for a connection to an applet in sess_prepare_conn_req()

MAJOR: session: check for a connection to an applet in sess_prepare_conn_req()

Instead of having applets bypass the whole connection process, we now
follow the common path through sess_prepare_conn_req(). It is this
function which detects an applet an sets the output state so SI_ST_EST
instead of initiating a connection to a server. It is made possible
because we now have s->target pointing to the applet.