clean up logic; make some stuff clearer; do not risk setting values to negatives to then skip them; just do not set if not needed

closes #1421

Thanks to Heather Gilmore, my wife, for grey-scaling the image. :-*

use of the interators to jide more of the underlying details.

catch icq. and icq but not icqsucks.org as jid that relates with transport. thx to knuckles for the idea