pull up r19621 from trunk

pull up r19621 from trunk

 r19621@cathode-dark-space:  jaltman | 2007-06-22 14:51:34 -0400
 ticket: 5584

 Each error context in NIM can maintain a progress counter to indicate
 the progress of the operation.  The progress counter for a context
 that contains child contexts should be computed by adding the progress
 counters of its children.  This update corrects the behavior of
 kherr_get_progress() and kherr_get_progress_i() to take child contexts
 into account.

 In addition, since the progress counter of a context now depend on the
 progress counters of its children, kherr_set_progress() will send
 progress change notifications for any parent context as well.

ticket: 5584

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19779 dc483132-0cff-0310-8789-dd5450dbe970