* Changed a lot of strncpy() calls to safestrncpy() and replaced most of their

* Changed a lot of strncpy() calls to safestrncpy() and replaced most of their
  hardcoded size arguments with 'sizeof' based arguments.
* Moved the CitContext destruction into the housekeeper thread and out of the
  thread being cancelled.  Didn't fix it, though (to see what happens, link
  the server against ElectricFence and watch what happens when a session ends).