Added optional core: prefix to first arg passed to freeswitch.Dbh for giving direct access to sqlite db

revert change from 2800ea19 and add disconnect packet on listener kill

use switch_queue_trypop_timeout instead of a timer in mod_loopback to improve audio quality when not using bowout features

use aleg arg to disable this

not sure the stuff is needed in the core iksemel. this will take some more teting via hudson and some more comits, but hey, it does not have an impact on anythingbut solaris and derivates