= MFC of r211190:

= MFC of r211190:
- Improve the wait4data() routine so it behaves better when checking
  print-jobs which have last-modification times that are in the future.
  This shouldn't happen, of course, but it can.  And when it did happen,
  the previous check could cause completely-spooled jobs to sit in the
  queue for 20 minutes per job.  The new code waits until the last-modify
  time is not changing, instead of making decisions based on the specific
  value of last-modify.

git-svn-id: svn://svn.freebsd.org/base/stable/8@216039 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f