David Brownell <david-b@pacbell.net> Minor doc updates:

 - Itemize the list of private customization examples
  for openocd.cfg

 - Add "override defaults" as a customization, specifically
  for the work area (back it up or relocate it)

 - Highlight some work area location issues

git-svn-id: svn://svn.berlios.de/openocd/trunk@2651 b42882b7-edfa-0310-969c-e2dbd0fdcd60