- retired unused jtag events. The code was incorrect

- hopefully clarified the difference between TRST and TMS reset.
- added DEBUG() statements w.r.t. state changes
- TRST released and moving out of TAP_TLR are completely
different events. Only TRST released has a DEBUG() statement


git-svn-id: svn://svn.berlios.de/openocd/trunk@496 b42882b7-edfa-0310-969c-e2dbd0fdcd60