Fix the problem with unattended deinstallation by not even attempting
to remove the stunnel user and group at all - just kill the package
Reported by: jan grant <firstname.lastname@example.org>,
Stephen Hurd <email@example.com> (in private mail a while ago),
and, I think, many others
Update to stunnel-4.00.
*** WARNING WARNING WARNING ***
The stunnel invocation has changed! The program no longer accepts
command-line options, but is controlled by a config file instead.
Please refer to the stunnel(8) manual page for more information.
Submitted by: Dan Langille <firstname.lastname@example.org>, lioux