- added "init" command. "init" and "reset" at end of startup script is equivalent

- added "init" command. "init" and "reset" at end of startup script is equivalent
  to daemon_startup(still supported).
- print warning if srst and trst change state at the same time when srst_and_trst
is seperate
- reset now performs a trst, examines and validates the jtag chain before targets
assert reset
- if startup fails to examine and validate the jtag chain, try a reset before
trying again

git-svn-id: svn://svn.berlios.de/openocd/trunk@552 b42882b7-edfa-0310-969c-e2dbd0fdcd60