Change notes for 2.0:

"I threw away all the old bugs and created a whole new set"

This implementation doesn't retain much code from the 1.4 release.
The major changes are the router configuration language (1.5 years in
development), improvements in the scheduler (1 week), and rationalization
of transport agent code (2 days).  There is a new system configuration
mechanism (the hostenv directory) and associated changes in the code.

Change notes for 1.4:

The following differences will be apparent from the 1.3 release:

- There are now three logical places for ZMailer files:

	POSTOFFICE	spool
	MAILBIN		binaries/programs
	MAILSHARE	configurations/databases/text/zmailer

  This is in response to the distinction between the architecture-dependent
  and -independent files, being made in SunOS 4.0 and presumably future UCB,
  DEC, Sun, and ATT releases.

- The $POSTOFFICE/forms directory has been moved to $MAILSHARE/forms.
  Remember to do this manually, using or merging in the contents of proto/forms.

- The scheduler configuration file has been renamed "scheduler.cf" (it
  was "scheduler.cntl").

- The $POSTOFFICE/.{router,scheduler}.pid files are now .pid.{router,scheduler}
  and a .pid.smtpserver has been added.

- There are manual pages for the zmailer script and the mailq program.
  The manual pages are not installed automatically, you may want to do it
  yourself.

